Optoelectronic devices are being used in a wide array of applications in telecommunications, solar cells, scientific instrumentation, data storage, automotive, and military applications. Photonic design and simulation methods are a prerequisite for a fundamental understanding of advanced photonic structures as well as for the development of new photonic devices and applications. Research on new materials, processes and design are giving rise to optoelectronic devices with higher efficiencies, denser integration, and better reliabilities. With the new breakthroughs in organic photonic devices, vertical-cavity surface-emitting lasers, semiconductor photodetectors and optoelectronic integrated circuits, new package designs and reliability methodologies must be developed as these devices increase in functionality and integration.

This conference is intended to provide a forum for the interchange of ideas on optoelectronic device at different levels, including design, simulation, fabrication, integration, and applications. The topics of this conference are broad and will cover, but not limited to, the following topics: ;
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Conference 11894

Optoelectronic Devices and Integration X

In person: 11 - 12 October 2021
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  • Poster Session
  • 1: Integrated Optical Devices I
  • 2: Integrated Optical Devices II
  • 3: Fiber-based Devices for Sensing and Communication I
  • 4: Fiber-based Devices for Sensing and Communication II
  • 5: Nanophotonic and Metamaterial Devices
  • 6: Optoelectronic Devices
Poster Session
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
Conference attendees are invited to attend the poster session on Monday afternoon. Come view the posters, ask questions, and network with colleagues in your field. Authors of poster papers will be present to answer questions concerning their papers. Attendees are required to wear their conference registration badges to the poster session.

Poster Setup: Monday 10:00 to 13:00
View poster presentation guidelines and set-up instructions at
https://spie.org/PA/poster-presentation-instructions
11894-22
Author(s): Jianjun Xiao, Chuanyi Tao, Hao Wang, Yan Zhao, Chongqing Univ. of Technology (China); Jingke Li, Chongqing Medical and Pharmaceutical College (China); Yueqing Zhu, Xiaofeng Gao, Chongqing Univ. of Technology (China)
On demand | Presented Live 11 October 2021
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In the field of integrated photonics, ring resonators and Mach-Zehnder interference structures are promising candidates for compact optical filters and electro-optic modulators. In this paper, we design two types of ring-loaded Mach-Zehnder interferometer, i.e., side-coupling a resonator in one of the MZI arms and side-coupling a resonator in both of the MZI arms. Through numerical analysis of the two structures, the waveguide radius of curvature, the waveguide spacing in the coupling region, and the radius of resonant ring are optimized and designed respectively. The spectral and transmission characteristics of the two structures are demonstrated. The numerical analysis results have practical reference value for the fabrication of resonator coupled Mach-Zehnder interferometer using 3D direct laser writing technology.
11894-23
Author(s): Liwei Yang, Furong Zhu, Wenlong Xu, Xinlai Liu, China Agricultural Univ. (China)
On demand | Presented Live 11 October 2021
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Aiming at the problem of joint resource management algorithm for visible light communication (VLC) and WiFi heterogeneous networks, this paper discusses different traditional resource scheduling algorithms, and finally we choose proportional fair (PF) algorithm as the basis, in order to improve the ability of users to obtain resources in different regions, a new resource scheduling algorithm is obtained by adding users’ packet delay and maximum delay and resource scheduling adjustment factor in different regions, thus, the utilization ratio of heterogeneous network resources can be improved. The results show that the optimized scheduling algorithm can improve the system throughput, fairness index and access delay probability (ADP).
11894-24
Author(s): Mingxiang Ma, Fufang Xu, Yingying Li, National Innovation Institute of Defense Technology (China), Beijing Academy of Quantum Information Sciences (China); Jie Wang, Yubo Xie, National Innovation Institute of Defense Technology (China)
On demand | Presented Live 11 October 2021
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Chaotic fiber ring lasers (CFRLs) can be regarded as a type of complex multi-longitudinal-mode (MLM) lasers in optical frequency domain. However, most experimental investigations on laser chaos generation are only restricted to measurements of total intensity dynamics, with frequency-domain longitudinal mode information neglected. In this work, we experimentally study the longitudinal mode dynamics of a CFRL with pump modulation by utilizing a heterodyne detection scheme, in which a beat signal between the chaotic laser and a reference laser is generated. High-resolution instantaneous emission spectra reflecting the fine longitudinal-mode structure of the CFRL in overall are measured through heterodyne detection. Besides, longitudinal mode frequency and intensity dynamics of the CFRL are monitored simultaneously via time-frequency analysis and discussed in detail. Experimental results show that the CFRL exhibits dense and irregular MLM oscillation all the time when operating at intensi
11894-25
Author(s): Liwei Yang, Ziyi Huang, Xiangcheng Yi, Wenlong Xu, China Agricultural Univ. (China)
On demand | Presented Live 11 October 2021
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Resource allocation management is the key issue to improve the performance of visible light communication (VLC) / WiFi hybrid network. This paper proposes an improved resource allocation algorithm based on proportional fairness (PF) algorithm. Its main idea is to compensate users, and then establish a VLC / WiFi hybrid network model to simulate the traditional algorithm and the improved algorithm respectively, It is verified that the improved algorithm has better fairness and higher throughput than the traditional algorithm.
11894-26
Author(s): Hua Liu, Luoyang Electro-optical Equipment Research Institute (China); Mingsuo Li, Ronggang Zhu, Liwei zhou, Science and Technology on Electro-optic Control Laboratory, China (China)
On demand | Presented Live 11 October 2021
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With an interval which between the elements as the initial amount, the form of motion of the elements is used as the free amount, and the distribution of the optical focal length and the form of the element motion can be obtained by calculating the equation sets. With the global method, the bandwidth has been amplified by ten times as compared with that of traditional ones.
11894-27
Author(s): Xiongshuo Yan, Yi'an Liu, Jiangwei Wu, Xiangmin Liu, Yuping Chen, Xianfeng Chen, Shanghai Jiao Tong Univ. (China)
On demand | Presented Live 11 October 2021
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Integrated optical amplifiers and light sources are of great significance for photonic integrated circuits (PICs) and have attracted many research interests. Doping rare-earth ions in materials as a solution to realize efficient optical amplifiers and lasing has been investigated a lot. We investigated the erbium-doped lithium niobate on insulator (LNOI). Here, we fabricated a 1-mol% erbium-doped LNOI microdisk with a high-quality factor. C-band laser emission at ∼1530 and ∼1560 nm (linewidth 0.12 nm) from the high-Q erbium-doped LNOI microdisk was demonstrated with 974- and 1460-nm pumping. What’s more, spiral waveguide amplifiers were also fabricated by the CMOS-compatible technique. A maximum internal net gain of 8.3 dB at 1530 nm indicating a net gain per unit length of 15.6 dB/cm with a compact spiral waveguide of 5.3 mm length and ~0.06 mm2 footprint was demonstrated.
11894-28
Author(s): Zhuping Fan, Jian-jun He, Zhejiang Univ. (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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In this letter, we design and experimentally demonstrate an integrated 16 x 16 cyclic-AWGR device targeting C-band DWDM routing applications with a channel spacing of 100 GHz. The AWGR featured the minimum peak insertion loss (IL) and worst crosstalk (XT) values that were measured about 1.65dB and 30 dB respectively. We also obtained the 3-dB bandwidth wider than 0.4 nm (50 GHz, 50% of the channel spacing) for all port combinations. The polarization dependent loss (PDL) was less than 0.39 dB at the ITU-T grid wavelength, and the measured polarization dependent wavelength shift (PDλ) was less than 0.03 nm. Meanwhile, the worst channel mismatch from ITU-T grid was measured as less than ± 6.3 GHz (0.05nm, 6.3% of the channel spacing), while the majority of the previously reported devices were more than 12%. Overall, we have achieved a high performance cyclic-AWGR device through a simple and convenient optimization design.
11894-29
Author(s): Liwei Yang, Wenlong Xu, Ziyi Huang, Xiangcheng Yi, China Agricultural Univ. (China)
On demand | Presented Live 11 October 2021
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In the heterogeneous network of visible light communication and WiFi, the fairness index of users is a key index when allocating resource bandwidth. In order to improve the fairness of the system, the average request rate of users and the distance from the wireless access point are mainly considered, and a new weight-based multi-team resource allocation algorithm is proposed to judge the priority of users based on these two indexes. First, the request rates of users are ranked in order, and the first and last two users are formed into a queue, and the first allocation is made according to the weight of the queue, and then the second allocation is made according to the respective weights of the users in the queue. The simulation results show that the fairness index is improved and the improved algorithm can be applied to resource allocation in heterogeneous networks.
11894-31
Author(s): Liwei Yang, Xiangcheng Yi, Ziyi Huang, Wenlong Xu, China Agricultural Univ. (China)
On demand | Presented Live 11 October 2021
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The increasing demand of mobile network communication bandwidth requires more information in the limited bandwidth. In this paper, a novel bidirectional transmission system architecture based on RoF-PON system and PWoF system is proposed, and the transmission performance of the hybrid system is simulated. In RoF-based mobile networks, the use of PWoF realizes the centralize power in CO, providing a more cost effective installation method for communication networks, as well as ease of operation and maintenance. The simulation results of the system verify the reliability and feasibility of the system, which proves that the hybrid transmission system of PWoF and RoF-PON can realize the bidirectional transmission of energy and wireless signals.
11894-32
Author(s): Zhi Cheng, Yongjun Guo, Lin Zhang, Tianjin Univ. (China)
On demand | Presented Live 11 October 2021
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Recently, near-field optical tweezers integrated on a chip based on silicon on insulator (SOI) have attracted more attention and are promising for biological and chemical analyses. Here we propose a low-loss tapered Si waveguide with a high-intensity gradient in the electric field to trap microparticles whose diameters vary from 1 μm to 5 μm. The high transmittance allows for cascading the traps along the direction of light propagation. Optical forces in all three dimensions are analyzed around a high-stiffness potential well obtained.
11894-33
Author(s): Yuchong Su, Jiu Min, Zhen Zeng, Zhiyao Zhang, Heping Li, Yong Liu, Univ. of Electronic Science and Technology of China (China)
On demand | Presented Live 11 October 2021
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In this paper, an injection-locked optoelectronic oscillator (OEO) based on frequency conversion filtering process is proposed and experimentally demonstrated. The kernel of the proposed scheme is that injection locking technique is employed to obtain a high side-mode suppression ratio, while the delay-matched frequency conversion filtering process is used to eliminate the phase noise influence of the local oscillation (LO) signal. In the proof-of-concept experiment, a single-mode oscillation at 10 GHz is realized, where the frequency of the LO signal was set to be 10.07 GHz and an intermediate frequency bandpass filter with a center frequency of 70 MHz and a 3-dB bandwidth of 50 kHz is employed. The side-mode suppression ratio and the phase noise are measured to be 76 dB and -123.5dBc/Hz@10kHz, respectively.
11894-34
Author(s): Liwei Yang, Lin Li, Furong Zhu, Jiacheng Lai, Xinlai Liu, Wencong Lai, China Agricultural Univ. (China)
On demand | Presented Live 11 October 2021
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In order to meet the requirement of high bandwidth of next generation access network, a RoF-WDM-PON system structure based on Millimeter Wave (MZM) has been proposed, which combines the advantages of MZM Radio over Fiber (RoF) and wavelength division multiplexing Passive Optical Network (WDM-PON). MZM modulation technology is used in the architecture for optical signal transmission between the central station and the base station. The proposed system enables to meet the requirements of high bandwidth and realize low loss transmission with single-mode optical fiber transmission length of 25km and minimum bit error rate of 10-4 simultaneously. The analytic results about waveform and bit error rate confirm that the proposed scheme is effective and reliable.
11894-37
Author(s): Lu-Yao Xiao, Xiao-Dong Lin, Southwest Univ. (China); Yu Liu, Chongqing Univ. of Posts and Telecommunications (China); Zi-Ye Gao, Xi Tang, Fan Ma, Zheng-Mao Wu, Guang-Qiong Xia, Tao Deng, Southwest Univ. (China)
On demand | Presented Live 11 October 2021
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We proposed a reconfigurable all-optical logic gate (AND, OR) based on a vertical-cavity surface-emitting laser with saturated absorber (VCSEL-SA) subject to dual pulse injection and numerically investigated the effects of injection delay, injection strength and bias current on the system performance. The results show that, through adjusting bias current, the pulse injection strength and the injection delay between two pulses, the reconfigurable all-optical logic gate (AND, OR) can be realized. For a suitable injection intensity, all-optical logic AND and OR gates can be implemented within a certain bias current range. Moreover, both AND and OR gates have good robust to noise under suitable injection strength. These results are expected to open a new window for future ultra-fast neuromorphic computing systems to solve complex classification and decision-making tasks.
11894-38
Author(s): Yang Yang, Yin Xu, Jiangnan Univ. (China); Dongmei Huang, The Hong Kong Polytechnic Univ. (China); Feng Li, Shenzhen Research Institute, The Hong Kong Polytechnic Univ. (China); Yue Dong, Bo Zhang, Yi Ni, Jiangnan Univ. (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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Acousto-optic modulator (AOM) connecting multi-physical fields (including electric field, mechanical field and optical field) requires an unform material platform to realize the effect couplings between these physical fields. Lithium niobate on insulator (LNOI) having excellent piezoelectric, photoelastic, and electro-optical features is an ideal choice for the AOM. For LNOI based AOM, the device size has been shrinked to the micrometer scale while the device modulation performance is still needed to be enhanced due to relatively low acousto-optic interaction (AOI). Here, we employ multi-mode waveguide supporting higher-order TE (TE_1) mode to enhance such AOI and the results show that the total refractive index change can be increased to ~7.13×10^-10 for a single phonon and V_πL can be reduced to ~0.0082 V·cm, which are superior to those of AOM working at the fundamental mode and electro-optic modulator. We hope such work could push the multi-mode applications of on-chip AOM.
11894-39
Author(s): Guangcan Mi, Chen Liu, Huawei Technologies Co., Ltd. (China)
On demand | Presented Live 11 October 2021
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In this work, we investigate the design of MRR as the laser cavity with nanosecond tuning speed. We numerically analyzed the effective index change of a PIN waveguide under carrier injection while taking into account the associated waveguide heating. The result shows a decreasing tuning efficiency with increased voltage, due to the contra-direction thermo-optic effect. We observed a turning point in the dependency of the effective index change over the applied voltage. The experimental results show that MRRs using heavier doping suffers less from the heating effect during electro-optic tuning, and confirms the turning point in the response curve. An MRR with medium doping was found to have near linear respond to the applied voltage up to 2π phase shift with a switching time of less than 20ns. The theoretical analysis and experimental results of this work could provide some guidance to the design and implementation of silicon PIN MRRs for the development of nanosecond tunable lasers.
11894-40
Author(s): Yongjun Guo, Chunshu Li, Tianjin Univ (China); Yang Wang, Tianjin Univ. (China); Xin Tong, Tianjin Univ (China); Lin Zhang, Tianjin Univ. (China)
On demand | Presented Live 11 October 2021
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As one of the fundamental phenomena in optics, reflection always occurs for the refractive index contrast between different materials for the impedance mismatch. In many applications, such as solar cells or photodetectors, reflection is an unwanted loss process and the reduction of reflection is highly desirable. Metasurfaces have attracted intensive attention recently for their ability to efficiently reshape electromagnetic waves in desired manners on a flat and ultrathin platform. Numerous new concepts, effects, and applications have been intensely studied in recent years. As some of the most important applications, metasurfaces exhibit the superior capability to enhance absorption, antireflection, and transmission. Here we demonstrate a silicon metasurface with significantly enhanced antireflection over a broad spectrum from 1 to 5 μm. Over the more than two-octaves bandwidth, the transmittance is all above 78% with an average value as high as 95%.
11894-41
Author(s): Hengkang Li, Jianji Dong, Huazhong Univ. of Science and Technology (China)
On demand | Presented Live 11 October 2021
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Optical neural networks (ONNs), a kind of neural network implemented by optical hardware, have attracted more and more attention due to their excellent performance. As a part of ONNs, nonlinear activation functions the key for ONN to achieve more various functions. The realization of nonlinear activation functions by optical hardware has become a research hotspot. Here, we propose and demonstrate an all-optical implementation of a nonlinear activation function, which utilizes the intrinsic absorption and the plasma dispersion effect of germanium at 1550nm. The one has a loss about 4.28db and a threshold power of 5.1mW, while the another has a loss around 11db and a threshold power of 56.2mW. This proves that our scheme has great potential for nonlinear activation functions.
11894-42
Author(s): Biao Zhang, LaBao Zhang, Rui Ge, Qi Chen, Jiayu Lyu, Guanglong He, Haochen Li, Feiyan Li, Xiaohan Wang, Hao Wang, Xiaoqing Jia, Lin Kang, Peiheng Wu, Shunli Yu, Nanjing Univ. (China)
On demand | Presented Live 11 October 2021
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The intrinsic mechanism of absorbing photons in superconductors reveals the interaction between photons and Cooper pairs, which is of great significance for developing new superconducting nanowire single photon detectors (SNSPDs). Here we propose a photon-assisted phase slip model to describe the interaction mechanism between photons and superconductors. In this model, incident photons destroy large quantities of Cooper pairs and reduce the free-energy barrier of the phase slip, resulting in proliferation in the phase slip events and leading to superconducting transition. The switching rates from the superconducting state of a niobium nitride nanowire under various photon irradiation and temperatures are calculated through the distribution of switching currents in the experiment. The experimental data can be well fitted by our deduced expression of phase slip rate after eliminating the influence of external noise.
11894-43
Author(s): Xingkai Sun, Nanjing Univ. of Aeronautics and Astronautics (China); Qixiang Cheng, Univ. of Cambridge (United Kingdom); Rui Cheng, Hefei Univ. of Technology (China); Yuxin Liang, United Microelectronics Ctr. (China); Shilong Pan, Ang Li, Nanjing Univ. of Aeronautics and Astronautics (China)
On demand | Presented Live 11 October 2021
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Spectral analysis is one of the most widely used analytical tools in scientific research and industry. Computational spectrometers can offer high performance within an ultra-compact footprint and have drawn numerous research interests. Previously demonstrated computational spectrometers typically consist of separate power-splitting components and spectral sampling components, which limit further reduction of the footprint. Here we prose a structure called random medium that combines the power-splitting function and spectral sampling function in the same component, which effectively reduces the footprint of the spectrometer and improve its performance at the same time. The simulations show 200 nm operation bandwidth, with 0.5 nm resolution, and a footprint of 0.006 mm2.
11894-44
Author(s): Wenchan Dong, Wentao Gu, Xiaoyan Gao, Xinliang Zhang, Wuhan National Research Ctr. for Optoelectronics (China)
On demand | Presented Live 11 October 2021
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Canonical logic units-based programmable logic array (CLUs-PLA) is an important combinational logic device for its flexibility and user-defined feature. All-optical high-speed CLUs-PLA will lay the foundation for future high-speed optical computing and optical logic processing chip. For standard three-input all-optical CLUs-PLA, one nonlinear device can produce only one type of three-input CLU. In this paper, we propose and experimentally demonstrate a scheme that one nonlinear device can produce eight different types of three-input CLUs simultaneously, owing to introducing bidirectional four-wave mixing and wavelength spacing optimization. We obtain error-free performance for all three-input CLUs operations at 40 Gb/s. Comparing to standard three-input all-optical CLUs-PLA, parallel all-optical CLUs-PLA based on our proposed scheme can greatly reduce the number of nonlinear devices and simplify the computing system.
11894-45
Author(s): Miao Wang, Juemin Yi, Yumin Zhang, Suzhou Institute of Nano-Tech and Nano-Bionics (China); Bing Cao, Soochow Univ. (Chile); Chinhua Wang, Soochow Univ. (China); Jianfeng Wang, Ke Xu, Suzhou Institute of Nano-Tech and Nano-Bionics (China)
On demand | Presented Live 11 October 2021
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Gallium nitride (GaN) -based light-emitting diodes (LEDs) have been widely used in lighting, display, communication and other fields due to their high brightness, high luminous efficiency and low power consumption. Polarized LEDs have important potential application in flat panel display, holographic display and imaging fields. It’s very important to study how to realize efficient polarized LEDs. Realizing directional radiation (collimation) is one of the effective methods to improve the utilization efficiency of polarized light. In this paper, we proposed an all-dielectric nanostructures, and found that the enhanced emission of the polarized LED can be controlled within a specific angle by optimizing the parameters of the all-dielectric nanostructures.
11894-46
Author(s): Haiyang Ding, Jiyang Shang, Shanghai Aerospace Electronic Technology Institute (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
11894-47
Author(s): Kunpeng Zhai, Ya Jin, Yinfang Chen, Jian Wang, Xin Wang, Ning Hua Zhu, Institute of Semiconductors (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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In order to solve the problem of large difference in the spot size between semiconductor laser and silicon-based optoelectronic chip, we propose a new silicon-based edge coupled spot size converter structure, which converts the size of laser spot into the size of silicon-based waveguide of 220nm. At the same time, it can be processed with mature CMOS technology to reduce the optical coupling loss and device length.
11894-48
Author(s): Jiyang Shang, Yu Zhang, Haiyang Ding, Peng Luo, Minjia Lin, Chongbin Yao, Shanghai Aerospace Electronic Technology Institute (China)
On demand | Presented Live 11 October 2021
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A complementary coplanar interdigital electrode photoconductive switch based on vanadium-nitrogen doped 4H-SiC bulk material was developed. The test results show that the combination of vanadium doping and coplanar interdigital electrode structure, the voltage capability of 4H-SiC photoconductive switch is significantly improved and the conductive resistance of 4H-SiC photoconductive switch under low light intensity is reduced. The bias voltage of 4H-SiC photoconductive switch is 10kV. The conductive resistance of 4H-SiC photoconductive switch excited by 0.4mJ 532nm laser is 50Ω. In a 50 Ω microwave system, the peak power output by the load is 0.5MW. By continuously increasing the injected laser energy to 2mj, the on resistance can be reduced to 6 Ω.
11894-49
Author(s): Hao Hu, Ruolan Wang, Liao Chen, Huazhong Univ. of Science and Technology (China); Weiqiang Wang, Xi'an Institute of Optics and Precision Mechanics (China); Chi Zhang, Huazhong Univ. of Science and Technology (China); Wenfu Zhang, Xi’an Institute of Optics and Precision Mechanics (China); Xinliang Zhang, Huazhong Univ. of Science and Technology (China)
On demand | Presented Live 11 October 2021
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Dissipative Kerr solitons generated in microresonators driven by a continuous wave pump laser have promise for widespread applications in spectroscopy and telecommunications. DKSs exhibit rich nonlinear phenomena and serve as a unique platform to study nonlinear physics. In this paper, an optimized all-optical radio frequency (RF) spectrum analyzer, also named frequency domain light intensity spectrum analyzer (fLISA), is used to characterize the various stable soliton states. Results show that the optimized f-LISA achieves a measurement bandwidth of 2.2 THz and a frame rate of 20.62 MHz. Therefore, the versatile RF spectral patterns of stable two-soliton states have successfully recorded by f-LISA. The relative azimuthal angles between two solitons within the round-trip can be extracted by applying an inverse Fourier transform to the RF spectra. It is believed that the f-LISA can function as a powerful tool to monitor the rich nonlinear dynamical phenomena in microresonators.
11894-50
Author(s): Wentao Deng, Liao Chen, Yu Yu, Huazhong Univ. of Science and Technology (China); Xiaojun Wu, Beihang Univ. (China); Xinliang Zhang, Huazhong Univ. of Science and Technology (China)
On demand | Presented Live 11 October 2021
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Terahertz polarization control has a wide range of applications in imaging, communication, biology, and analytical chemistry. Polarization rotator is of great significance as one of the main units of a polarization controller. In this paper, we propose and simulate a terahertz polarization rotator based on silicon asymmetrical structure, whose polarization extinction ratio reaches up to 35 dB and 26 dB for transverse electronic and transverse magnetic modes, respectively. Its 15-dB bandwidth is 40 GHz for a conversion length of 4.4 mm. The results show that the integrated scheme can achieve the function of polarization rotation with high conversion efficiency. We believe it will play an important role in terahertz polarization management.
11894-51
Author(s): Guangcan Mi, Chen Liu, Huawei Technologies Co., Ltd. (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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Optical switching technology is outperforming in alleviating bandwidth limitation and reducing time latency in DCN than its electronic counterpart, especially in HPC and AI applications. In all-optical DCN, computing nodes are interconnected through OXC and communicating with each other using light with different wavelengths through its ports. In this work, we propose two architectures of wavelength switching network with high efficiency and low cost. By exploiting ns-level MZI-based silicon photonic switch as the fundamental building block, we employ an 8x8 electro-optical switching array to facilitate the fast wavelength configuration ability of the proposed architectures in avoiding routing conflicts and maximizing network flexibility. The verification of system for architectures consist of a laser bank, 8x8 photonics switching array, OXC and optical transceiver module, we get the link budgets of the system under different factors which may affect the stability. The proposed archite
11894-52
Author(s): Weijing Kong, Wenhui Zhao, Xiaochang Ni, Tianjin Univ. of Technology and Education (China)
On demand | Presented Live 11 October 2021
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Here we report a high-sensitive Bloch surface wave sensor by integrating a graphene metasurface and a truncated one-dimensional (1D) photonic crystal (PC) multilayer structure. The device is configured to be able to excite BSW mode accompanied with a sharp resonance dip, aiming at greatly enhanced sensing performance of the device structure. The sensing capability of the proposed sensor device is theoretically evaluated by investigating the excited mode properties. The result shows that the graphene metasurface coated Bloch surface wave sensor can reach superior detection sensitivity, thus could offer an obvious promotion for improving the performance of Bloch surface wave based sensing applications.
11894-30
Author(s): Guohao Zhu, Shenzhen Univ. (China); Wei Xu, Xi'an Institute of Optics and Precision Mechanics (China), Univ. of Chinese Academy of Sciences (China); Cheung Chuen Yu, Yangtze Delta Region Institute, Tsinghua Univ. (China); Wenye Sun, The Second Affiliated Hospital of Soochow Univ. (China); Bo Dong, Shenzhen Technology Univ. (China); Changyuan Yu, The Hong Kong Polytechnic Univ. (China), Shenzhen Research Institute (Hong Kong, China); Wei Zhao, Yishan Wang, Xi'an Institute of Optics and Precision Mechanics (China), Univ. of Chinese Academy of Sciences (China), Collaborative Innovation Ctr. of Extreme Optics, Shanxi Univ. (China)
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Deep Neural Network (DNN) assisted activity monitoring algorithms are investigated, aiming to discriminate three activity states, including presence without movement, nobody in bed, and presence with movement. The signal is collected from a fiber-based Mach-Zehnder Interferometer (MZI) sensor, which is placed under a 20-cm thick mattress. When people are lying on the mattress, cardiopulmonary activities will lead to the change of the phase difference of the MZI optical fiber sensor. In this paper, three kinds of DNNs are developed to investigate the classification performance, including feedforward neural network (FNN), convolutional neural network (CNN), and long short-term memory network (LSTM). The accuracy of FNN, CNN and LSTM is 95.14%, 99.01%, and 99.37% within one second, respectively. Moreover, LSTM has low time and space complexity and better performance.
11894-35
Author(s): Xinning Jiang, Soochow Univ. (China); Wei Xu, Xi'an Institute of Optics and Precision Mechanics (China), Univ. of Chinese Academy of Sciences (China); Cheung Chuen Yu, Haina-Intelligent Photonic System Research Ctr. (China), Yangtze Delta Region Institute, Tsinghua Univ. (China); Wenye Sun, The Second Affiliated Hospital of Soochow Univ. (China); Bo Dong, College of New Materials and New Energy, Shenzhen Technology Univ. (China); Changyuan Yu, Shenzhen Research Institute (China), The Hong Kong Polytechnic Univ. (Hong Kong, China); Wei Zhao, Yishan Wang, Xi'an Institute of Optics and Precision Mechanics (China), Univ. of Chinese Academy of Sciences (China), Collaborative Innovation Ctr. of Extreme Optics, Shanxi Univ. (China)
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Real-time SAHS events detection system during sleep is proposed and investigated based on contact-free Mach-Zehnder Interferometer ballistocardiograph (MZI-BCG) senor, which is placed under the mattress. The breath activity influences the optical phase difference of the MZI which is demodulated with 3*3 optical coupler. In this paper, three SAHS events are successfully detected, including OSAS (Obstructive sleep apnea syndrome), CSAS (Central sleep apnea syndrome) and MSAS (Mixed sleep apnea syndrome). The proposed system is simple, cost-effective and non-invasive, which has great potential application in home monitoring.
11894-36
Author(s): Yifan Liu, Zongru Yang, Changyuan Yu, The Hong Kong Polytechnic Univ. (Hong Kong, China)
On demand
11894-54
Author(s): Siyi Wang, Chao Xu, Zbigniew Wasilewski, Dayan Ban, Univ. of Waterloo (Canada)
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Terahertz quantum cascade lasers (THz QCLs) in metal-metal (MM) waveguides were fabricated and hetero bonded on aluminum nitride (AlN) substrate as heat sink submount. The light – current density – voltage (L-J-V) characterization results show the comparable maximum operating temperature (Tmax at 93-95 K) for THz QCLs on AlN and GaAs in short pulse injection (250 ns). At long pulse duration, the light intensity drops much faster for THz QCL on GaAs, and eventually leads to lasing quenching when the pulse duration above 30 us at 80 K. On the other hand, THz QCL on AlN shows much stronger light intensity and slower decrease with the increase of pulse injection than THz QCL on GaAs at the same measurement conditions. This study shows suspected joule heating plays a great role on THz QCLs operating from long duty cycle towards quasi-CW mode, showing AlN substrate as high thermal conductivity material has superior thermal management properties for heat extraction and dissipation.
11894-55
Author(s): Jian Yin, Dayan Ban, Univ. of Waterloo (Canada)
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In this article, efficiency performance of blue GaN/InGaN micro light emitting diodes (μ-LEDs) are investigated as functions of chip sizes, quantum barrier doping level and the number of quantum wells (QWs) by simulation. Internal quantum efficiency (IQE) and external quantum efficiency (EQE) drastically decrease with decreasing mesa sizes of μ-LEDs. The simulation indicates that μ-LEDs with n-doped quantum barriers can effectively suppress the Shockley-Read-Hall (SRH) nonradiative recombination and improve the efficiency compared to those with intrinsic quantum barriers in small μ-LEDs. The simulated results also show that decreasing the number of QWs can improve the IQE of μ-LEDs with higher radiative recombination rate in a single QW. An optimized design for 5×5 μm2 GaN/InGaN μ-LEDs with n-doped barriers and a single QW shows around 367% efficiency improvement at 1 A/cm2 comparing to the conventional intrinsic multiple QWs-based design in simulation.
11894-56
Author(s): Yegao Xiao, Zhiqiang Li, Zhanming S. Li, Crosslight Software Inc. (Canada)
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Two-dimensional modeling of the InP/InGaAsP modified uni-traveling carrier photodiodes is reported. Basic device characteristics like dark I-V curve, device capacitance effect, frequency response and bandwidth etc., are presented. The simulation shows high bandwidth comparable with the experimental report. The results are further discussed with respect to the cliff layer dopant density.
Session 1: Integrated Optical Devices I
In person: 11 October 2021 • 14:30 - 15:30 China Standard Time
Session Chair: Xuping Zhang, Nanjing Univ. (China)
11894-1
Author(s): Jing Xu, Yuhang Hu, Hanwen Hu, Bowen Zhang, Xinda Lu, Boqing Zhang, Yuntian Chen, Xinliang Zhang, Huazhong Univ. of Science and Technology (China)
In person: 11 October 2021 • 14:30 - 15:00 China Standard Time
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Information capacity of single-mode fiber communication system faces fundamental limitations imposed by optical nonlinearities. Space division multiplexing offers a new dimension for upgrading fiber communication system but faces many challenges. In this talk, I will give an overview on our recent efforts on upgrading all optical signal processing for spatial division multiplexed signals. Mode diversity scheme and dispersion engineering are two different technical routes towards overcoming the mode - dependent nonlinearities. We show various singal processing functions including wavelength conversion, optical logics, and optical regeneration with key techniques identified. Since power consumption and footprint are at the heart of practical consideration, we further discuss nonlinear enhancement for MDM signals using a carefully designed single multi-mode micro-resonator.
11894-2
Author(s): Lei Lei, Shenzhen Univ. (China)
In person: 11 October 2021 • 15:00 - 15:30 China Standard Time
Break
Tea/Coffee Break 15:30 - 16:00
Session 2: Integrated Optical Devices II
In person: 11 October 2021 • 16:00 - 17:40 China Standard Time
Session Chair: Baojun Li, Jinan Univ. (China)
11894-3
Author(s): Heng Zhou, Boyuan Liu, Xinjie Han, Qiang Zhang, Yong Geng, Kun Qiu, Univ. of Electronic Science and Technology of China (China)
On demand | Presented Live 11 October 2021
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Integrated dissipative Kerr soliton frequency comb is a promising multi-wavelength laser source for fiber optical communications. In the scenario of coherent optical transmission, a highly beneficial but rarely explored target is to re-generate a frequency comb at the receiver side as local oscillators that conserve the frequency and phase property of the incoming data carriers, so that to enable coherent detection with minimized optical and electrical compensations. Also, in the scenarios of all-optical signal regeneration, a multi-wavelength coherent laser array is also needed to provide the coherent pump fields that enable phase-sensitive parametric amplification of the degraded data signals. In this talk, we will present our recent experiments that implement re-generation of Kerr soliton microcombs that faithfully clones the frequency and phase coherence of another microcomb, and use such coherence-cloned Kerr combs for coherent data receiving and all-optical phase regeneration.
11894-4
Author(s): Jilin Zheng, Tao Pu, Xin Zhang, Jin Li, The PLA Univ. of Science and Technology (China)
In person: 11 October 2021 • 16:30 - 17:00 China Standard Time
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Recent advances in monolithically integrated multi-section semiconductor lasers (MI-MSSLs) have propelled microwave photonic technologies to new potentials with a compact, reliable, and green implementation. Much research has examined that MI-MSSLs can realize the same or even better microwave photonic functions compared to discrete lasers by taking advantages of enhanced light–matter interactions. They are beneficial towards the future of integrated microwave photonics (IMWP) once integrating the other optical components. Herein, these recent advances in this emerging field are reviewed and discussed. The focus of this talk is on the photonic microwave techniques based on the nonlinear dynamics of MI-MSSLs, consisting of electro-optic conversion characteristics enhancement, photonic microwave generation, microwave photonic filter, as well as multi-wavelength laser array for wavelength division multiplexing radio-over-fiber (WDM-RoF) networks.
11894-5
Author(s): Lei Meng, Tao T. Yang, Institute of Semiconductors (China)
In person: 11 October 2021 • 17:00 - 17:20 China Standard Time
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A new material platform of c-axis oriented Zn1-xMgxO thin films is being developed for nonlinear optical waveguides on Si. Mg-incorporation into wurtzite ZnO not only improves the quality of film growth but also increases the second-order nonlinear susceptibility of the material under an optical frequency electric field. The second harmonic generation measurement and Maker-fringe analysis reveal that the second-order nonlinear susceptibility tensor element Chi33 of the annealed Zn0.72Mg0.28O is approximately 4.2 times larger than that of ZnO. The propagation loss of 633 nm wavelength light in the annealed air/Zn0.72Mg0.28O/SiO2 slab waveguide is 0.68 ± 0.09 dB/cm and 0.48 ± 0.03 dB/cm for the TE0 and TM0 modes, respectively. The propagation loss of 1550 nm wavelength light in Zn0.72Mg0.28O ridge waveguide would be less than 0.5 dB/cm. These results suggest the great potential of the c-axis oriented Zn0.72Mg0.28O thin films for applications in on-chip optical interconnects.
11894-6
Author(s): Zixu Xu, Yaocheng Shi, Zhejiang Univ. (China)
On demand | Presented Live 11 October 2021
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In this paper, we demonstrate an athermal, fabrication-tolerant and flat-topped 4 channel coarse wavelength-division multiplexing (de)multiplexer based on cascaded Mach-Zehnder interferometers with different arms on silicon-on-insulator. The two arms use strip waveguide and slot waveguide respectively. By optimizing the waveguide widths and lengths of two arms in every MZI, the influence of temperature and waveguide broadening is compensated. The best temperature dependent center wavelength shift of the four channels is about 12 pm/K , and the best waveguide broadening dependent center wavelength shift is about 0.06 nm/nm, while the 1-dB and 3-dB bandwidths are ~14 nm and ~19nm with 20 nm free spectral range (FSR) and the crosstalk is <-20dB at center wavelength.
Session 3: Fiber-based Devices for Sensing and Communication I
In person: 12 October 2021 • 09:00 - 10:00 China Standard Time
Session Chair: Xiaobei Zhang, Shanghai Univ. (China)
11894-7
Author(s): Li-Xia Zhao, Tiangong Univ. (China), Institute of Semiconductors (China)
In person: 12 October 2021 • 09:00 - 09:30 China Standard Time
11894-8
Author(s): Yixin Zhang, Nanjing Univ. (China)
In person: 12 October 2021 • 09:30 - 10:00 China Standard Time
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The power grid is a large system connected by numerous power generation, transmission, transformation, distribution, and electrical equipment. The phase-sensitive optical time domain reflectometry (Φ-OTDR) has the potential to satisfy the monitoring requirement of power equipment. We first proposed an on-line monitoring scheme of transmission line status by investigate the relationship between vibration frequency and load of overhead transmission line, which is presented to monitor sag, vibration amplitude and ice thickness. Then, for buried power transmission line, we established a vibration event position estimation model, which offers a promising option for early warning of buried power transmission lines. In the end, we make attempts to assess structural health of wind turbine by laying optical fiber on the wind turbine tower, and the characteristics of wind turbine vibration under different working conditions are summarized by analyzing the vibration propagation characteristic.
11894-9
Author(s): Xiaodan Pang, Richard Schatz, Mahdieh Joharifar, KTH Royal Institute of Technology (Sweden); Aleksejs Udalcovs, RISE Research Institutes of Sweden (Sweden); Vjaceslavs Bobrovs, Riga Technical Univ. (Latvia); Lu Zhang, Xianbin Yu, Zhejiang Univ. (China); Yan-Ting Sun, Sergei Popov, Sebastian Lourdudoss, KTH Royal Institute of Technology (Sweden); Oskars Ozolins, RISE Acreo AB (Sweden), KTH Royal Institute of Technology (Sweden), Riga Technical Univ. (Latvia)
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we summarize our recent achievements in free-space communications in the mid-infrared (MIR) region enabled by directly modulated quantum cascaded laser (QCL) at 4.65µm (~65 THz). A commercial mercury cadmium telluride (MCT, HgCdTe) photovoltaic (PV) MIR detector with a built-in trans-impedance amplifier was used as the receiver. We evaluated the transmission performance both with and without the beam collimator. Without beam collimator, the free-space link distance was limited to only around 5 centimeters and the highest achievable data rate was limited to 4 Gbps with both 4-level pulse amplitude modulation (PAM4) and discrete multitone (DMT) signals. With proper collimation, the link distance was increased by at least 10-fold with a large power margin, and the received signal-to-noise ratio (SNR) can be enhanced to support higher data rates up to 6 Gbps with PAM8 signal with bit error rate (BER) performance below the 6.7% overhead hard-decision forward error correction (HD-FEC) limit.
Break
Tea/Coffee Break 10:00 - 10:30
Session 4: Fiber-based Devices for Sensing and Communication II
In person: 12 October 2021 • 10:30 - 11:50 China Standard Time
Session Chair: Xinliang Zhang, Wuhan National Research Ctr. for Optoelectronics (China)
11894-10
Author(s): Changyu Shen, China Jiliang Univ. (China)
In person: 12 October 2021 • 10:30 - 11:00 China Standard Time
11894-11
Author(s): Nan Chi, Fudan Univ. (China)
In person: 12 October 2021 • 11:00 - 11:30 China Standard Time
11894-12
Author(s): Cong Ma, Nanjing Univ. of Aeronautics and Astronautics (China), Suzhou Research Institute of NUAA (China); Yue Yang, Fengting Cao, Xin Jiang, Xi Liu, Shangzhe Xu, Xiangchuan Wang, Nanjing Univ. of Aeronautics and Astronautics (China); Shifeng Liu, Nanjing Univ. of Aeronautics and Astronautics (China), Suzhou Research Institute of NUAA (China); Shilong Pan, Nanjing Univ. of Aeronautics and Astronautics (China)
On demand | Presented Live 12 October 2021
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In this paper, we propose an approach to measure distributed optical fiber transfer delay (OFTD) with high accuracy and high spatial resolution. By utilizing an optical frequency shifting loop based on carrier-suppressed single-sideband modulation, an optical frequency-stepped chirp signal with a bandwidth of up to hundreds of GHz is obtained and used to measure distributed OFTDs. In an experiment, a millimeter-level spatial resolution and sub-picosecond-level accuracy are achieved. This work has the potential to promote the development of some optical applications, such as optically controlled phased array antennas, distributed optical fiber sensing, and optical fiber communications, etc.
Break
Lunch Break 11:50 - 13:20
Session 5: Nanophotonic and Metamaterial Devices
In person: 12 October 2021 • 13:20 - 14:50 China Standard Time
Session Chair: Xiaobei Zhang, Shanghai Univ. (China)
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Author(s): Xuhan Guo, An He, Jinlong Xiang, Yaotian Zhao, Yikai Su, Shanghai Jiao Tong Univ. (China)
In person: 12 October 2021 • 13:20 - 13:50 China Standard Time
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Metamaterials have unique optical properties with designed building blocks arranged on subwavelength scales, inspiring intense research efforts in silicon photonics. Here, we propose and demonstrate some new kinds of optical metamaterials-assisted patterns on a silicon waveguide to realize the optical signal manipulation in modes, wavelengths and edge coupling.
11894-14
Author(s): Yaocheng Shi, Zhejiang Univ. (China)
In person: 12 October 2021 • 13:50 - 14:20 China Standard Time
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The sub-wavelength grating (SWG), which is a one-dimensional array of deeply sub-wavelength nano-strips, can provide precise control over modal confinement, effective index, dispersion and birefringence, showing great potentials in high-performance nano-photonic devices. The SWG based on silicon waveguides thereby opening up new approaches to manipulate the optical responses and control the flow of light. In this talk, we will introduce some of our recent work on the silicon metamaterial based silicon integrated devices, including the bent multi-mode waveguides, multi-mode crossings, and also the polarization manipulation devices.
11894-15
Author(s): Lin Zhang, Tianjin Univ. (China)
On demand | Presented Live 12 October 2021
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We propose a new function enabled by grating couplers, which is for optical trapping. The emitted light from a grating coupler is made to mimic spherical wave in near field, in order to a produce local gradient of optical intensity and thus an optical gradient force. It is shown that this enables effective trapping of relatively big particles in size of a few microns, which has been difficult if integrated photonic structures are used for evanescent field trapping.
11894-16
Author(s): Keval K. Sonigara, Oxford Suzhou Ctr. for Advanced Research (China); Hailong Wang, Changchun Institute of Applied Chemistry (China); Jiang Chao, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University (China); Zhiyuan Xie, Changchun Institute of Applied Chemistry (China); Jian Fan, Institute of Functional Nano & Soft Materials (China); Jingsong Huang, Oxford Suzhou Ctr. for Advanced Research (China); Paul N. Stavrinou, Univ. of Oxford (United Kingdom); Donal D. C. Bradley, King Abdullah Univ. of Science and Technology (Saudi Arabia)
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Solution-processed metal halide perovskite light-emitting diodes (Pe-LEDs) show great promise in a range of optoelectronic applications. However, these devices can be limited by poor interfaces to the perovskite films due to poor crystallization control during film processing caused by de-wetting from the bottom layer. The deep (Highest Occupied Molecular Orbital) HOMO levels of the emitters also lead to large charge injection barriers for standard electrodes. To improve this, we develop and report on a small molecule, BPS2, based on phenothiazine-benzimidazole with Lewis base sites. This promising interfacial material is then applied to blue PeLEDs where the energy band alignment of BPS2 to the blue perovskite emitter helps to reduce the hole-injection barrier while blocking electrons. BPS2 can be solution-processed with non-chlorinated organic solvents and provides improved wettability towards perovskite precursor solutions compared to conventional PEDOT:PSS hole transport films.
Break
Tea/Coffee Break 14:50 - 15:20
Session 6: Optoelectronic Devices
In person: 12 October 2021 • 15:20 - 16:50 China Standard Time
Session Chair: Xuping Zhang, Nanjing Univ. (China)
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Author(s): Jianzhong Zhang, Harbin Engineering Univ. (China)
In person: 12 October 2021 • 15:20 - 15:50 China Standard Time
11894-18
Author(s): Tong Yu, Cheng Zhang, Shaolong Wu, Xiaofeng Li, Soochow Univ. (China)
In person: 12 October 2021 • 15:50 - 16:10 China Standard Time
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Author(s): Yang Zhang, Nankai Univ. (China)
In person: 12 October 2021 • 16:10 - 16:30 China Standard Time
Conference Chair
Nanjing Univ. (China)
Conference Chair
Jinan Univ. (China)
Conference Chair
The Hong Kong Polytechnic Univ. (Hong Kong, China)
Conference Chair
Wuhan National Research Ctr. for Optoelectronics (China)
Program Committee
Dayan Ban
Univ. of Waterloo (Canada)
Program Committee
Beckman Laser Institute and Medical Clinic (United States)
Program Committee
Zhejiang Univ. (China)
Program Committee
The Chinese Univ. of Hong Kong (Hong Kong, China)
Program Committee
Ionexphotonics Inc. (Canada)
Program Committee
Nanjing Univ. of Posts and Telecommunications (China)
Program Committee
Univ. of Massachusetts Lowell (United States)
Program Committee
Univ. of Southampton (United Kingdom)
Program Committee
Univ. of Science and Technology of China (China)
Program Committee
The Univ. of New South Wales (Australia)
Program Committee
Yaocheng Shi
Zhejiang Univ. (China)
Program Committee
Allwave Lasers Devices Inc. (United States)
Program Committee
Boston Univ. (United States)
Program Committee
Frank Vollmer
Univ. of Exeter (United Kingdom)
Program Committee
The Univ. of Texas at Austin (United States)
Program Committee
Lixin Xu
Univ. of Science and Technology of China (China)
Program Committee
Yang Yang
Zhejiang Univ. of Technology (China)
Program Committee
Huazhong Univ. of Science and Technology (China)
Program Committee
Ningmu Zou
Advanced Micro Devices, Inc. (United States)
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