Recent advances in semiconductor lasers are resulting in improvements in power, spatial brightness, spectral brightness, and wavelength ranges from the UV to the mid-IR. These advances led to better performance and reduced cost in diode pumped laser systems and opened the door for new direct diode applications including materials processing, metrology, printing, display, biomedical, imaging, Raman spectroscopy, remote sensing, etc. This conference intends to cover the following, and related topics: ;
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Conference 11891

Semiconductor Lasers and Applications XI

In person: 11 - 12 October 2021
On demand starting 10 October 2021
View Session ∨
  • Poster Session
  • 1: Applications of Laser Diodes I
  • 2: Applications of Laser Diodes II
  • 3: Semiconductor Lasers I
  • 4: Semiconductor Lasers II
  • 5: Subsystems Using Laser Diodes I
  • 6: Subsystems Using Laser Diodes II
2021-09-16T21:11:56-07:00
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UPCOMING LIVE EVENTS:
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
11891-29
Author(s): Shuai Shao, Yunhao Wu, Jiachen Li, Sigang Yang, Hongwei Chen, Minghua Chen, Tsinghua Univ. (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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We demonstrate a hybrid integrated laser with nearly two folds of direct modulation bandwidth enhancement and 150 folds of linewidth reduction, by introducing the photon-photon resonance effect and the self-injection locking effect simultaneously to a commercial DFB laser through an external high-Q silicon nitride microring reflector (MRR). Different from the widely studied passive feedback laser, the proposed high-Q MRR keeps the DFB laser in strong self-injection locking state, which can achieve stable narrow linewidth single-mode output with high Side-Mode Suppression Ratio. After package the proposed hybrid laser, we measure its direct modulation bandwidth and linewidth, which are increases from 7.70GHz to 15.28GHz, and narrows from 600kHz to 4kHz, respectively. This work explores a compact footprint and low cost modulation bandwidth enhancement and linewidth reduction scheme for many applications such as high speed coherent optical communications and microwave photonics.
11891-30
Author(s): Qi Jing, Jiachen Li, Baoyu Zhang, Yu Li, Sigang Yang, Hongwei Chen, Minghua Chen, Tsinghua Univ. (China), Beijing National Research Ctr. for Information Science & Technology (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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A tunable narrow linewidth laser with external cavity is demonstrated in this paper, which realizes single longitudinal mode operation across several nanometer wavelength tuning range with narrow linewidth of 5 kHz. The structure of this kind of tunable narrow linewidth lasers is a commercial DFB laser butt coupling to an external cavity, consisting of an adjustable phase shifter and a tunable micro-ring resonator (MRR) fabricated on the low-loss Si3N4 waveguide platform. A transmission matrix model is presented and the influences of the DFB grating, the adjustable phase shifter and the MRR on the wavelength performance of the laser have been analyzed. In the experiment, the laser linewidth is reduced from 500kHz to 5kHz and single longitudinal mode operation across several nanometer with narrow linewidth is realized through the effect of the external cavity.
11891-31
Author(s): Jiachen Li, Minghua Chen, Hongwei Chen, Sigang Yang, Beijing National Research Ctr. for Information Science and Technology (China), Tsinghua Univ. (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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We report a compact and robust laser linewidth reduction solution for commercially available distributed feedback (DFB) semiconductor lasers by butt-coupling a Si3N4 high-Q microring reflector to a DFB semiconductor laser. We fabricate the microring reflector on the 80nm-thick high-aspect-ratio Si3N4 waveguide platform. The 3-dB bandwidth and the free spectral range of the fabricated Si3N4 microring reflector are measured to be 50 MHz and 12.5 GHz, respectively, corresponding to a Q factor of over 3.8 million and finesse of 250. In the experiment, the intrinsic linewidth of the hybrid integrated laser is reduced to an ultra-low level of 2.95 Hz. The proposed hertz-linewidth hybrid integrated laser has great potentials in high-speed coherent optical communications systems and high-resolution optical metrology.
11891-32
Author(s): Jie Chen, Guan Wang, Lingjie Zhang, Yaowen Zhang, Zhiyao Zhang, Yali Zhang, Shangjian Zhang, Yong Liu, Univ. of Electronic Science and Technology of China (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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A novel laser phase noise measurement method based on self-homodyne structure with a Faraday rotating mirror (FRM) and an optical coherent receiver is proposed and demonstrated. The proposed method is simple in structure and easy to operate. Compared with the ordinary phase noise measurement system of self-homodyne optical coherent receiver, the length of the required delay fiber is halved and the polarization of the optical signal is more stable. Experimental results show that the proposed method can accurately characterize the phase noise and the linewidth of the laser under test, which are consistent with those obtained by the ordinary self-homodyne method.
11891-33
Author(s): Chao Jing, Yutong He, Yali Zhang, Zhiyao Zhang, Shangjian Zhang, Yong Liu, Univ. of Electronic Science and Technology of China (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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Electroabsorption-modulated laser (EML) is integrated by distributed feedback (DFB) laser and electro-absorption modulator (EAM). Microwave interaction in the EML has been observed to limit modulation performance especially in high frequency region. In this work, the EML is investigated as a three-port network with two electrical inputs and one optical output. Scattering matrix of the device was derived theoretically and obtained experimentally. Thus, microwave equivalent circuit model of the EML can be established and microwave interaction between the DFB laser and the EAM was successfully extracted. The results reveal that microwave interaction within an integrated EML contains both electrical isolation and optical coupling. The electrical isolation is bidirectional while the optical coupling is directional, which aggravates the performance of the EML. This result can provide a reference for further device optimization design.
11891-34
Author(s): ChangDa Xu, Ya Jin, Yinfang Chen, Ning Hua Zhu, Institute of Semiconductors (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
11891-35
Author(s): Hua Liu, Luoyang Electro-optical Equipment Research Institute (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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On the design methods and traditional micro system structures in multiple configurations, there are some certain limitations. In order to resolve the problems of the conventional multiple structures present in the system, new sensors and components are applied in the development of the design method and system configuration. Micro lens, as a kind of typical components, are developing the methodology in research advanced multiple configuration systems. Methods show that the system can meet the application requirements in MTF, REA, RMS and other related criteria. And the determining factors are the prototype selection and the system configuration. Results show that they are effective solutions.
11891-36
Author(s): Ya Jin, Yichao Qi, Yinfang Chen, Wei Chen, Ning Hua Zhu, Institute of Semiconductors (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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A novel optical frequency-hopping scheme based on a dual parallel structure for secure fiber-optic communications is proposed and demonstrated. A parallel structure is constructed in which the upper arm contains a dual parallel Mach–Zehnder modulator (DPMZM) while the lower one contains another DPMZM and a phase modulator (PM). In the proposed scheme, critical users’ data are divided into a lot of segments, and these segments are transmitted by different multiple channels corresponding to different wavelengths in time domain. In other words, one channel optical carrier carries different users’ data segments. In this paper, the viability of a four-wavelength-frequency-hopping secure optical communication system with a 25-Gb/s error-free transmission through a 32-km single-mode fiber and an 8-km dispersion compensation fiber was demons
11891-37
Author(s): Ramzil R. Galiev, Valery Lobanov, Nikita Kondratiev, Igor Bilenko, Russian Quantum Ctr. (Russian Federation)
On demand starting 10 October 2021
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Recently, cost-effective narrow-linewidth (sub-Khz) compact diode laser with high side mode suppression rate (more that 40 dB) and high output power (100 mW) was demonstrated by self-injection locking an ordinary multi-mode diode laser to a high-Q microresonator. Moreover, it was found that with proper optical design, the external cavity allows several locked dominant longitudinal modes to laze, which might find use in communication purposes as each locked mode have narrow linewidth and high power. However, due to a diode laser's tendency to exhibit complex dynamics, the application of several mode locking is far from trivial. Diode lasers are well-known to display complicated features such as mode hopping, transitions to chaos, longitudinal mode competition and nonlinear dynamics. In this paper we report on the results obtained from the derivation multi-mode rate equations for the longitudinal modes of a diode lasers locked to high quality factor.
Session 1: Applications of Laser Diodes I
In person: 11 October 2021 • 14:30 - 16:00 China Standard Time
Session Chair: Shangjian Zhang, Univ. of Electronic Science and Technology of China (China)
11891-1
Author(s): Sha Zhu, Beijing Univ. of Technology (China), Institute of Semiconductors (China); Ming Li, Ning Hua Zhu, Wei Li, Institute of Semiconductors (China)
In person: 11 October 2021 • 14:30 - 15:00 China Standard Time
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In this paper, we have summarized our proposed schemes for optical generation and anti-dispersion transmission of frequency-chirped microwave waveforms. Using Fourier mode-locked optoelectronic oscillator, frequency chirped microwave waveforms with large time-bandwidth products are generated. Combining the generation and transmission requirements of dual chirp microwave waveforms, a variety of optical schemes based on power fading frequency response shifting technology, optical frequency multiplication and carrier frequency shifting technology, as well as equivalent splitting parabolic phase modulation technology are proposed to generate and transmit dual chirp signals with anti-dispersion performance. All these works have good application prospects in radar networks.
11891-2
Author(s): Yunfan Zhang, Tianhua Xu, Jiazheng Ding, Ziyihui Wang, Jian Zhao, Tiegen Liu, Tianjin Univ. (China)
In person: 11 October 2021 • 15:00 - 15:20 China Standard Time
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Investigations on laser phase noise compensation algorithm based on digital signal processing technologies has become more and more significant. A multi-ring carrier phase recovery algorithm is developed for compensating the laser phase noise in optical fiber communication systems using high-order modulation formats. The degradations on performance of communication systems due to the laser phase noise have been investigated. Our results demonstrate that the laser phase noise can greatly degrade achievable information rates of communication systems. Besides, compared to the conventional Viterbi-Viterbi algorithm, which is usually applied in the QPSK system, our proposed algorithm can also well mitigate the laser phase noise in 16-QAM, 64-QAM and 256-QAM optical communication systems.
11891-3
Author(s): Yue Wang, Bo Li, Pengfei Liu, Fenghuan Hao, Hangzhou Applied Acoustics Research Institute (China)
In person: 11 October 2021 • 15:20 - 15:40 China Standard Time
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Conventional fiber-optic communication systems always work at room temperature or below 85°C, which makes it difficult to be used in high-temperature environment. We design and develop a method of fiber-optic communication system working at high temperature. High-temperature optical communication devices are also developed. The high-speed transmission scheme under high temperatures is realized, which enable real-time, long-range, high data rate bidirectional transmission and can be applied in industrial control or extreme environment operations like oil and coal mining, where high-reliability, real-time performance and high-capacity are needed.
11891-4
Author(s): Pengjiang Qiu, Ganggang Cui, Xiaoli Zhou, Xugao Cui, Pengfei Tian, Fudan Univ. (China)
In person: 11 October 2021 • 15:40 - 16:00 China Standard Time
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Fog is a common weather condition and could severely degrade the vehicle-to-vehicle communication performance. In this work, a 450 nm blue LD was used to establish a high-speed VLC system in a foggy channel. Based on the 16-QAM-OFDM, a maximum data rate of 4 Gbps was achieved under a link length of 60 cm and a pass loss of 13.06 dB, which was the highest data rate ever reported. Then, the link length was extended to 16.9 m to realize a more practical VLC application utilizing the multi-reflection of mirrors. A data rate of 2 Gbps was also obtained successfully with the pre-equalization.
Break
Tea/Coffee Break 16:00 - 16:20
Session 2: Applications of Laser Diodes II
In person: 11 October 2021 • 16:20 - 17:40 China Standard Time
Session Chair: Shangjian Zhang, Univ. of Electronic Science and Technology of China (China)
11891-5
Author(s): Zheng Liu, Tianjin Univ. (China); Tianhua Xu, Tianjin Univ. (China), The Univ. of Warwick (United Kingdom), Univ. College London (United Kingdom); Yunfan Zhang, Jianzheng Ding, Tiegen Liu, Mupeng Li, Tianjin Univ. (China)
In person: 11 October 2021 • 16:20 - 16:40 China Standard Time
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The enhanced Gaussian noise (EGN) model is considered as an excellent solution to predict the system performance taking into account linear and nonlinear transmission impairments. In this work, we have investigated the accuracy of the closed-form EGN model for ultra-wideband optical fiber communication systems, where the performance of the system using electronic dispersion compensation, multi-channel nonlinearity compensation and full-field nonlinearity compensation has been evaluated in terms of symbol rate, number of channels, transmission distance and signal power.
11891-6
Author(s): Jiazheng Ding, Tianjin Univ. (China); Tianhua Xu, Tianjin Univ. (China), The Univ. of Warwick (United Kingdom), Univ. College London (United Kingdom); Yunfan Zhang, Zheng Liu, Tianjin Univ. (China); Cenqin Jin, The Univ. of Warwick (United Kingdom); Jian Zhao, Tiegen Liu, Tianjin Univ. (China)
In person: 11 October 2021 • 16:40 - 17:00 China Standard Time
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The impact of the equalization enhanced phase noise (EEPN) on the efficacy of the multi-channel digital back-propagation (MC-DBP) in Nyquist-spaced optical transmission systems using advanced modulation formats have been investigated. Degradation on information rates and transmission distances of communication systems due to the EEPN have also been studied. Our results demonstrate that the EEPN poses stricter constraints on the local oscillator (LO) laser linewidths of transmission systems, with the increase of the back-propagated bandwidths, especially in the case of FF-DBP. From this point of view, although a higher-level modulation format will lead to higher spectral efficiency, it will also make the transmission system more susceptible to the EEPN.
11891-8
Author(s): Liang Peng, Fei Wang, Guang-Qiong Xia, Zheng-Mao Wu, Southwest Univ. (China)
In person: 11 October 2021 • 17:00 - 17:20 China Standard Time
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We propose and experimentally investigate a scheme for generating multi-channel chaotic signal with time delay signature (TDS) suppression based on a weak-resonant-cavity Fabry-Perot laser diode (WRC-FPLD) subject to dispersive optical feedback, which is provided by a broadband linearly chirped fiber Bragg grating (LCFBG). The experimental results show that, through introducing optical feedback provided by broadband LCFBG with high reflectivity, multiple longitudinal modes with central wavelength spanning more than 25 nm can be driven into chaotic state. The influences of the feedback strength on the bandwidth and the TDS of the generated chaotic signal are also analyzed.
11891-9
Author(s): Mupeng Li, Tianjin Univ. (China); Tianhua Xu, Tianjin Univ. (China), The Univ. of Warwick (United Kingdom), Univ. College London (United Kingdom); Jiazheng Ding, Zheng Liu, Junfeng Jiang, Tiegen Liu, Tianjin Univ. (China)
In person: 11 October 2021 • 17:20 - 17:40 China Standard Time
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Coherent optical fiber systems can achieve long-distance, large-capacity and high data-rate transmissions. In this work, the transmission capacity and reach of high-speed coherent optical fiber communication systems have been investigated. The performance of multi-channel (up to C-band) Nyquist-spaced coherent optical communication systems has been evaluated in terms of achievable information rates, transmission distances and signal-to-noise ratios, considering different influencing factors, such as nonlinearity compensation, signal input power and modulation format.
Session 3: Semiconductor Lasers I
In person: 12 October 2021 • 08:30 - 10:00 China Standard Time
Session Chair: Sha Zhu, Institute of Semiconductors, Chinese Academy of Sciences (China)
11891-10
Author(s): Yaoran Huang, Zhaoyu Zhang, The Chinese Univ. of Hong Kong, Shenzhen (China)
In person: 12 October 2021 • 08:30 - 09:00 China Standard Time
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Silicon photonics technology has monolithically integrated photoelectric devices such as waveguides, modulators, beam splitters, detectors, but currently silicon photonics technology cannot monolithically integrate the light source of the core component, that is, semiconductor laser. Here, our partners use the method of III-V lateral growth on SOI based Si (111) to effectively solve the problems of lattice mismatch and large buffer layer thickness [5]. What’s more, we hope to make single-mode continuous-wave nanobeam microcavity laser on a lateral growth III-V quantum well epitaxial wafer, which is electrical pumped at room-temperature, and coupling out through Si waveguide. This design is expected to solve the key problems of next-generation optical communication chips or quantum communication chips, making it possible to monolithically integrate semiconductor lasers with silicon photonics chips.
11891-11
Author(s): Liwei Tang, Hongxiang Jia, Sigang Yang, Hongwei Chen, Minghua Chen, Tsinghua Univ. (China)
In person: 12 October 2021 • 09:00 - 09:20 China Standard Time
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A novel pre-distortion linearization of frequency modulation based on thermal tuning by iterative learning is proposed. The update algorithm is not only based on the error of frequency sweep but also its first order differential. A narrow linewidth laser with bandwidth of 5GHz and repetition rate of 1KHz is achieved. A least squares linear fitting is applied to the averaged laser frequency sweep showing (1-r^2) less than 10e-8, and the single-ramp nonlinearity νnl,rms is less than 1MHz. The proposed method can also be used in achieving arbitrary frequency sweep waveform and adapted to other thermo tuning process.
11891-12
Author(s): Xiaobo La, Xuyuan Zhu, Jing Guo, Song Liang, Institute of Semiconductors (China)
In person: 12 October 2021 • 09:20 - 09:40 China Standard Time
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In this paper, we report the fabrication of a laterally tapered InP SSC in a reverse mesa shape. With an optimized wet etching condition, a reverse ridge waveguide for which the top width is significantly larger than the bottom width can be obtained. With this process, a SSC having a waveguide tip as narrow as 200 nm can be obtained with a high yield through conventional photolithography. A 1.3 μm InGaAlAs/InP laser integrated with the laterally tapered SSC has been fabricated. The Threshold current of the 1000 μm long device is 25 mA and 44 mW single facet optical power can be obtained at 300 mA current. The lateral and vertical divergence angles are as low as 11° and 13°, respectively.
11891-13
Author(s): Jingwei Wang, Tuanwei Fu, Dong Hou, Lijun Gao, Chung-en Zah, Xingsheng Liu, Focuslight Technologies, Inc. (China)
In person: 12 October 2021 • 09:40 - 10:00 China Standard Time
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The near field non-linearity (Smile) and lasing uniformity of emitters for high power diode laser arrays are critical to high reliable optically coupled modules and laser heads in a cladding system. To obtain the lower smile and higher lasing uniformity, two CTE-matched substrates are employed to bond a single GaAs-based diode laser array with the cavity length of 2mm on a MCC cooler using Gold-Tin solder. Structural optimization is carried out to reduce the thermal stress and smile for this package. The theoretical simulation results indicate that the smile and thermal stress is lowered 0.49μm and 20MPa, respectively. After the structural optimization, the experimental results showed that the ratio of Smile value(average smile ~0.87μm) <1μm was ~71% and higher ~30% than that of conventional structure(average smile ~1.3μm). Importantly, the ratio of lasing numbers among all emitters under 10A above threshold current was higher ~40% than that of before optimization.
11891-14
Author(s): Muhammad Ajml Khan, RIKEN Ctr. for Advanced Photonics (Japan)
On demand starting 10 October 2021
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Eco friendly, smart, and high-power deep-ultraviolet (DUV) laser diodes (LDs) and ultraviolet-B laser diodes (UVB LDs), light sources are needed in the area of metal industry, bio- and chemical-sensing, disinfection, surface monitoring and COVID-19 suppression. By using low cost approach, first, we attempted to the optically-pumped AlGaN DUV LD devices grown on low cost AlN template on C-Sapphire substrate. Stimulated emission spectra at 274 nm was clearly observed for the first time even at RT in the optically pumped UVC Laser. We also demonstrated to AlGaN DUV LD grown low cost AlN template on C-Sapphire substrate with improved injection current density of 48 kA/cm2, however some abnormal stimulated oscillations were also observed for the first time in the DUV LD at 273 nm emission at RT. However, electrically-pumped AlGaN-based 283-band UVB LD was quite challenging due to both the issue of low injection current density. Therefore, in this work both the conventional flat-type ud-AlGa
11891-15
Author(s): Nuran Dogru, Hilal S. Duranoglu Tunc, Gaziantep Üniv. (Turkey); Ali M. Al-Dabbagh, Tishk International Univ. (Iraq)
On demand starting 10 October 2021
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For the first time gain-switched short pulse generation with a width of 25-40 ps from excited state is demonstrated applying an external optical beam to the excited state of InAs-InP-(113)B quantum dot laser using theoretical model. The model is based on the rate equations, which are solved by the Runge –Kutta method. Our results showed that without an optical beam, long pulse widths are obtained because of the ground state transition. However, with an optical Gaussian beam, short pulses with a width of 25–40 ps with a high peak power are generated owing to the excited state transition at low currents. These results are important for long-distance optical transmissions as well as medical biotechnology.
Break
Tea/Coffee Break 10:00 - 10:30
Session 4: Semiconductor Lasers II
In person: 12 October 2021 • 10:30 - 11:50 China Standard Time
Session Chair: Sha Zhu, Institute of Semiconductors, Chinese Academy of Sciences (China)
11891-16
Author(s): Yu Huang, Soochow Univ. (China)
In person: 12 October 2021 • 10:30 - 10:50 China Standard Time
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We propose a novel SKD scheme based on polarization-shift-keying chaos synchronization in commonly driven QD spin-polarized VCSELs without any external feedback. The polarization-shift-key is obtained by randomly and independently controlling the polarization ellipticity of the response lasers. Moreover, the commonly-driven QD spin-polarized VCSELs without any external feedback constitute an open-loop configuration. It has the advantage of a simple structure/low cost, where no feedback is needed, and more importantly, it yields a rather short synchronization recovery time- hundreds of picoseconds- and results in the enhancement of the key distribution rate. The proposed SKD scheme provides a new potential way to implement high-performance key distribution.
11891-17
Author(s): Yingmin Fan, Dandan Zhou, Hongtao Chong, Bin Zhao, Peng Wang, Ke Yuan, Chung-en Zah, Xingsheng Liu, Focuslight Technologies, Inc. (China)
In person: 12 October 2021 • 10:50 - 11:10 China Standard Time
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In this work we introduce a kind of VCSEL line-beam module with unique optical shaping design for LiDAR applications. The module has a uniform line beam with peak power larger than 200W, pulse width of 4ns, divergence angle of 0.12° @ 1/e2, and the vertical axis intensity uniformity is better than 80%. The experimental data showed that under a wide temperature range from - 40 ℃ to 110 ℃ the power attenuation rate of the line beam module is less than 20%, the variation of horizontal divergence angle is less than 5%, and the temperature drift coefficient is 0.066nm/℃, which greatly reduces the performance requirements of the receiver detector for the Lidar system. In addition, we introduce a prototype of new line-beam modules with peak power higer than 1000W we are developing, which can meet further requirement of long-distance LiDAR system.
11891-18
Author(s): Zhongming Zheng, Yang Mei, Hao Long, Xiamen Univ. (China); Jason Hoo, Shiping Guo, Advanced Micro-Fabrication Equipment, Inc. (China); Leiying Ying, Zhiwei Zheng, Baoping Zhang, Xiamen Univ. (China)
In person: 12 October 2021 • 11:10 - 11:30 China Standard Time
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In this work, we successfully fabricated an optically pumped AlGaN-based VCSEL with a lasing wavelength of 275.91 nm, working at room temperature. The lasing line width and the threshold power density are 0.78 nm and 1.21MW/cm2, respectively2, as shown in Fig.1. This is the shortest wavelength VCSEL and the first lasing in the UVC range for VCSELs, to the best of our knowledge.
11891-19
Author(s): Xumin Cheng, Hong Han, Li Li, Zhi Wei Jia, Taiyuan Univ. of Technology (China)
In person: 12 October 2021 • 11:30 - 11:50 China Standard Time
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We present a comprehensive study of the stability boundary of long external cavity delayed optical feedback induced interband cascade lasers(ICL). Using the modified Lang-Kobayashi equations, we numerically investigate the effects of some key parameters on the first Hopf bifurcation point of ICL with optical feedback, such as delay time(τf), pump current(I), linewidth enhancement factor(LEF), stage number(m), and feedback strength. It is found that compared with τf , I, LEF and m have significant effect on the stability of the ICL. Additionally, our results show that ICL with external cavity optical feedback is more easily to enter an unstable at relative high LEF, low I and small value of m when τf is fixed.
Break
Lunch Break 11:50 - 13:20
Session 5: Subsystems Using Laser Diodes I
In person: 12 October 2021 • 13:20 - 15:00 China Standard Time
Session Chair: Yali Zhang, Univ. of Electronic Science and Technology of China (China)
11891-20
Author(s): Mengke Wang, Yutong He, Ying Xu, Zhao Liu, Yali Zhang, Zhiyao Zhang, Shangjian Zhang, Yong Liu, Univ. of Electronic Science and Technology of China (China)
In person: 12 October 2021 • 13:20 - 13:50 China Standard Time
11891-21
Author(s): Yali Zhang, Guan Wang, Zhiyao Zhang, Shangjian Zhang, Yong Liu, Univ. of Electronic Science and Technology of China (China)
In person: 12 October 2021 • 13:50 - 14:20 China Standard Time
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Featured a series of comb teeth with evenly spacing and stable phase relationship in frequency domain, optical frequency comb (OFC) has attracted great attention and has been widely applied in various fields. We reviewed our previous work about OFC generation seeded by optical injection technology. A primary seed OFC is originated from the nonlinear dynamics in the directly modulated semiconductor laser under optical injection, and its performance is improved by using different techniques. It can be promoted by subharmonic modulation, where the subharmonic is provided by an external RF source. And it can be enhanced by the self-recirculating modulation with no additional RF source needed, wherein the modulating signal is derived from the primary OFC. Recently, we propose a two-stage booster composed of subharmonic electro-optic modulation and four wave mixing effect to obtain robust OFC. Finally, future research interests are discussed.
11891-22
Author(s): Wei-Lai Wu, Dian-Zuo Yue, Zheng-Mao Wu, Guang-Qiong Xia, Southwest Univ. (China)
In person: 12 October 2021 • 14:20 - 14:40 China Standard Time
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In this work, based on double reservoir layers composed of two Mach-Zehnder modulators (MZMs), a novel optoelectronic RC system is proposed and the system performances for processing handwritten numeral recognition (HNR) are analyzed. For such a system, a masked handwritten numeral information is injected into the first reservoir layer, the different value between two adjacent node states of the first reservoir layer is sent to the second reservoir layer, and the virtual node states of the second reservoir layer are extracted for training and testing. The simulated results show that, by optimizing the system parameters, a word error rate (WER) of 0.11 for processing HNR can be achieved. By comparing with an optoelectronic RC with a single reservoir layer, the optoelectronic RC with two reservoir layers possesses better performances for processing HNR.
11891-23
Author(s): Jun Wang, Xiao-Dong Lin, Southwest Univ. (China); Yu Liu, Chongqing Univ. of Posts and Telecommunications (China); Zi-Ye Gao, Xi Tang, Qiu-Lan Zheng, Zheng-Mao Wu, Guang-Qiong Xia, Tao Deng, Southwest Univ. (China)
In person: 12 October 2021 • 14:40 - 15:00 China Standard Time
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Based on two response semiconductor lasers (RLs) subject to identical chaos optical injection with phase modulation and phase-to-intensity conversion, we propose and numerically investigate a security-enhanced high-speed messages transmission system. The results show that, through introducing phase modulation and phase-to-intensity conversion into the injected chaos signal from DL, its effective bandwidth can be expended from 12.4GHz to 39.6GHz, and the time delay signature (TDS) can also be suppressed to below 0.05. Simultaneously injecting this chaotic signal into two RLs, high-quality chaotic carriers with wide bandwidth and low TDS for two RLs can be obtained. Moreover, high-quality chaos synchronization between two RLs while bad cross-correlation between DL and any one of RLs can be achieved even under a certain parameter mismatches. Based on this chaos synchronization, security-enhanced 10 Gbits/s message transmission over 150km fiber channel can be successfully realized.
Break
Tea/Coffee Break 15:00 - 15:30
Session 6: Subsystems Using Laser Diodes II
In person: 12 October 2021 • 15:30 - 17:10 China Standard Time
Session Chair: Yali Zhang, Univ. of Electronic Science and Technology of China (China)
11891-24
Author(s): Ke Yang, Yali Zhang, Shuxu Liao, Guan Wang, Zhiyao Zhang, Shangjian Zhang, Yong Liu, Univ. of Electronic Science and Technology of China (China)
In person: 12 October 2021 • 15:30 - 15:50 China Standard Time
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In this paper, we propose and numerically investigate a novel method to generate optical frequency comb (OFC) based on mutual injection in twin-stripe semiconductor laser (a cell array integrating two lasers on the same chip). Due to the existence of optical confinement factors and the small waveguide spacing, considerable lateral coupling or mutual injection occurs between the two neighbors. The twin-stripe semiconductor laser will be driven into complex nonlinear dynamic states and can be employed to generate OFCs. The proposed mutual-injection-based OFC scheme does not need additional microwave sources and modulators. At the same time, this compact OFC generator is free of any auxiliary optical passive devices compared with typical master-slave injection configuration. The numerical results indicate that the comb spacing of the mutual-injection-based OFC can be flexibly adjustable by changing mutual injection parameters, and the number of comb teeth is large and flatness is great.
11891-25
Author(s): Hong Han, Zhi Wei Jia, Taiyuan Univ. of Technology (China); K. Alan Shore, Bangor Univ. (United Kingdom); An Bang Wang, Jian Guo Zhang, Taiyuan Univ. of Technology (China)
In person: 12 October 2021 • 15:50 - 16:10 China Standard Time
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Random-modulation of continuous-wave midinfrared Quantum Cascade Laser (QCL) is proposed to enhance range resolution and anti-jamming capability in QCL lidar. Exploiting the high-modulation frequency capability of QCL, random modulation signals with frequency of order 10 GHz are predicted to provide distance resolution of order 1 mm order. Cross-correlation functions and auto-ambiguity functions of the probe and jamming signals with different powers are calculated. The simulations show that the proposed mid-infrared QCL lidar has strong anti-jamming capability.
11891-26
Author(s): LiQuan Zhu, Guan Wang, Yuhua Yang, Binghui Yao, Chun Gu, Lixin Xu, Univ. of Science and Technology of China (China)
In person: 12 October 2021 • 16:10 - 16:30 China Standard Time
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We demonstrate a six-primary-laser projection system compatible with 3D and 2D display, achieve great 3D viewing experience with low crosstalk lower than 1% by time-multiplexed stereoscopic display technology and spectral coating glasses. In addition, we study the volume color gamut of this system in 2D working mode. The color gamut is greatly increase to an amazing 178.4% NTSC, owing to the application of multi-primary color and narrow spectral line-width laser source. This system is also provide the possibility for us to study the color gamut involving binocular fusion in 3D working mode in future.
11891-27
Author(s): Li Zhang, Xiao-Dong Lin, Guang-Qiong Xia, Zheng-Mao Wu, Southwest Univ. (China)
In person: 12 October 2021 • 16:30 - 16:50 China Standard Time
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Based on a semiconductor laser optically injected by a directly current-modulated semiconductor laser, an scheme for generating FMCW signal is proposed and investigated numericallly. The simulation results show that the bandwidth of FMCW is depended on the injection coefficient and modulation current amplitude under the modulation frequency of 100MHz. Under optimized condition, the bandwidth of FMCW signal can reach 15.4GHz, and the corresponding sweep rate is 4.83GHz/ns. After introducing the optoelectronic feedback loop, the frequency comb contrast of FMCW can be increased by about 20dB when the reciprocal of the feedback delay time exactly matches with the modulation frequency.
11891-28
Author(s): Dandan Zhou, Bin Zhao, Yingmin Fan, Hongtao Chong, Gang Wang, Peng Wang, Ke Yuan, Leon Li, Lei Gao, Chung-en Zah, Xingsheng Liu, Focuslight Technologies, Inc. (China)
In person: 12 October 2021 • 16:50 - 17:10 China Standard Time
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We have introduced three types of transmitter modules based on VCSEL, which can be used in intelligent driving LiDAR and driver monitoring system. The line beam module achieved a horizontal divergence angle of 0.1 ° and a vertical divergence angle of 23°, the vertical beam light intensity uniform more than 80%, which can be used in long distance detection for LiDAR. The area beam module achieve the field of view of 125 ° x 20 °, which can be used in medium and short distance detection for LiDAR; The illumination module is realized the FOV is 160 ° x 120 °, which can be applied in driver monitoring system. All three modules have stable performance in a wide temperature range (from – 40℃ to 110℃).
Conference Chair
Wei Li
Institute of Semiconductors, Chinese Academy of Sciences (China)
Conference Chair
Technische Univ. Berlin (Germany)
Conference Chair
Shanghai Jiao Tong Univ. (China)
Program Committee
Tsinghua Univ. (China)
Program Committee
Nanjing Univ. (China)
Program Committee
Fudan Univ. (China)
Program Committee
Tyndall National Institute (Ireland)
Program Committee
Dawei Di
Zhejiang Univ. (China)
Program Committee
Accelink Technologies Co., Ltd. (China)
Program Committee
Shanghai Jiao Tong Univ. (China)
Program Committee
Ming Li
Institute of Semiconductors, Chinese Academy of Sciences (China)
Program Committee
Xianjie Li
China Electronics Technology Group Corp. (China)
Program Committee
Univ. of Electronic Science and Technology of China (China)
Program Committee
Institute of Optics and Electronics, Chinese Academy of Sciences (China)
Program Committee
Tyndall National Institute (Ireland)
Program Committee
City Univ. of Hong Kong (Hong Kong, China)
Program Committee
Tsinghua Univ. (China)
Program Committee
Changchun Univ. of Science and Technology (China)
Program Committee
Shawn Wang
Luxtera, Inc. (United States)
Program Committee
Institute for Infocomm Research (Singapore)
Program Committee
Southwest Univ. (China)
Program Committee
Kun Xu
Beijing Univ. of Posts and Telecommunications (China)
Program Committee
Southwest Jiaotong Univ. (China)
Program Committee
Jinlong Yu
Tianjin Univ. (China)
Program Committee
Univ. of Bristol (United Kingdom)
Program Committee
Li Zeng
Huawei Technologies Co., Ltd. (China)
Program Committee
Baoping Zhang
Xiamen Univ. (China)
Program Committee
Guo-yi Zhang
Peking Univ. (China)
Program Committee
Shangjian Zhang
Univ. of Electronic Science and Technology of China (China)
Program Committee
Wuhan National Research Ctr. for Optoelectronics (China)
Program Committee
Peking Univ. (China)
Program Committee
Institute of Semiconductors, Chinese Academy of Sciences (China)
Program Committee
Beijing Univ. of Technology (China)
Program Committee
Southwest Jiaotong Univ. (China)
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