Real-time photonic measurement of fast non-repetitive events is arguably the most challenging problem in the fields of instrumentation and measurement. The challenge is performing fast continuous single-shot measurements for applications ranging from sensing, spectroscopy, and imaging. Some of the example applications include the study of optical rogue waves, detection of rare cancer cells in blood, industrial inspection and machine vision. Notwithstanding the sensitivity and speed limitations of single-shot real-time measurements, such instruments also create a big data problem. Owing to their high measurement rate, they produce a firehose of data that overwhelms even the most advanced computers. This necessitates innovations in data management and in-inline processing techniques.

The aim of this conference is to create a forum for presentation of the latest developments in real-time photonic instruments, data management and real-time processing, and to create a forum for exchange of ideas in this new and exciting field of photonic instrumentation.

This conference intends to cover the following, and related topics: ;
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Conference 11902

Real-time Photonic Measurements, Data Management, and Processing VI

In person: 10 - 12 October 2021
On demand now
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  • Opening Ceremony and Plenary Session I
  • 1: Imaging and Sensing I
  • Plenary Session II
  • 2: Imaging and Sensing II
  • 3: Biomedical Imaging and Sensing
  • Poster Session
  • 4: Advanced Lasers and Applications
  • 5: Signal Processing
  • 6: Photonic Measurement I
  • 7: Photonic Measurement II
  • 8: Photonic Measurement III
Opening Ceremony and Plenary Session I
In person / Livestream: 10 October 2021 • 09:00 - 12:00 China Standard Time
9:00: Opening Ceremony
9:20: Awards and Recognition

11900-501
Author(s): Rebecca R. Richards-Kortum, Director, Rice 360 Institute for Global Health Technologies (United States), Rice Univ. (United States)
In person / Livestream: 10 October 2021 • 09:30 - 10:10 China Standard Time
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This talk will examine the challenges of designing and translating new low-cost optical technologies to improve global health equity, drawing from examples to improve newborn survival in African hospitals, to improve early detection of cervical cancer for women in Texas and Latin America, and to improve point-of-care diagnosis of COVID-19. The talk will summarize lessons learned to increase the diversity of innovation teams, and to increase the impact and sustainability of the resulting innovations.
Tea/Coffee Break 10:10 - 10:40
11890-502
Author(s): Wentao Wang, State Key Lab. of High Field Laser Physics (China), CAS Ctr. for Excellence in Ultra-intense Laser Science (China), Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences (China)
In person: 10 October 2021 • 10:40 - 11:20 China Standard Time
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X-ray free-electron lasers can generate intense and coherent radiation at wavelengths down to the sub-ångström region and have become indispensable tools for applications in structural biology and chemistry, among other disciplines. Several X-ray free-electron laser facilities are in operation; however, their requirement for large, high-cost, state-of-the-art radio-frequency accelerators has led to great interest in the development of compact and economical accelerators. Laser-wakefield accelerators can sustain accelerating gradients more than three orders of magnitude higher than those of radio-frequency accelerators, and are regarded as an attractive option for driving compact X-ray free-electron lasers. However, the realization of such devices remains a challenge owing to the relatively poor quality of electron beams that are based on a laser-wakefield accelerator. After ten years of efforts, we present an experimental demonstration of undulator radiation amplification in the exponential-gain regime by using electron beams based on a laser-wakefield accelerator.
11893-503
Author(s): Rui Zhu, Peking Univ. (China)
In person: 10 October 2021 • 11:20 - 12:00 China Standard Time
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Perovskite solar cells have attracted tremendous attention in recent years due to the high device performance and the superior optoelectronic properties of perovskite materials. In this talk, I will give an introduction about the advances of perovskite solar cells. Then, I will present our efforts on improving the device performance and understanding the device physics of perovskite solar cells. In addition, I will also discuss the advantages of perovskite solar cells for space aircraft application. We have some preliminary efforts of sending the perovskite solar cells into near space. I will share our view about the exciting possibilities for perovskite solar cell technology.
Break
Lunch Break 12:00 - 13:30
Session 1: Imaging and Sensing I
In person: 10 October 2021 • 13:30 - 15:10 China Standard Time
Session Chair: Tuan Guo, Jinan Univ. (China)
11902-1
Author(s): Chi Zhang, Xinliang Zhang, Huazhong Univ. of Science and Technology (China)
On demand | Presented Live 10 October 2021
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Spectroscopy is an essential tool to explore the interaction between light and matter. With the extensive study of ultrafast phenomena, ultrafast spectrum analysis is in great demand. In view of the limited acquisition frame rate of the conventional spectroscopy, the ultrafast temporal focusing mechanism was proposed and demonstrated, and it is capable of capturing arbitrary waveform signal, with the acquisition frame rate up to 100 MHz. Moreover, several approaches have been proposed to further improve its accuracy and bandwidth, it has achieved 2-pm spectral resolution and 58-nm observation bandwidth, and the observation range has been further extended to microwave and terahertz span. Furthermore, this spectroscopy has successfully characterized ultrafast phenomena and mechanisms of devices, and has been applied to several ultrafast spectral imaging systems.
11902-7
Author(s): Benzhang Wang, Yupeng Zhang, Fan Zhou, Xianlei Ye, Dongliang Quan, China Aerospace Science & Industry Corp., Ltd. (China)
On demand | Presented Live 10 October 2021
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In practical engineering applications, the real-time monitoring of structural physical field is very important, which requires overall performance improvements on the Brillouin optical fiber sensing, including fast measurement, quick data demodulation and small amount of data storage. A novel Brillouin optical time-domain analysis (BOTDA) scheme has been proposed based on compressed sensing and pattern recognition algorithms, which paves the way for the real-time Brillouin optical fiber sensing. In order to test the sensing performance, the Brillouin gain spectrum is measured by the traditional fast BOTDA, where the frequency step and span are 4 MHz and 500 MHz, respectively. By employing the proposed algorithms, the strain information is directly obtained with only 35% of the full data, verifying the feasibility of real-time measurements.
11902-3
Author(s): Henan Wang, Zongda Zhu, Dengwang Zhou, Dexin Ba, Yongkang Dong, Harbin Institute of Technology (China)
On demand
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Brillouin-based optical fiber sensors have been developed over the past few years and played a significant role for distributed temperature and strain measurements. Among these sensors, Brillouin optical fiber sensors via optical chirp chain (OCC) become an ideal choice for ultrafast distributed measurement to distinguish quick-changing events in practical applications. This paper begins with the introduction of the concept of OCC and the schemes of OCC generation. The efforts towards such OCC based Brillouin optical fiber sensing for ultrafast measurement are reviewed here as well, with the OCC based BOTDA, the OCC based BOTDR and many other optimization efforts. In addition, the spectra distortion in OCC based distributed sensing is inevitable due to the transient SBS effect resulting from the fast frequency sweep of OCC. The consequent future challenges of OCC based distributed sensing are discussed and presented as well.
Break
Tea/Coffee Break 15:10 - 15:30
Plenary Session II
In person / Livestream: 10 October 2021 • 15:30 - 16:20 China Standard Time
15:30: Welcome and Introduction

Q&A period will follow after the talk
11905-504
Author(s): Peter L. Knight, Blackett Lab., Imperial College London (United Kingdom), UK National Quantum Technology Strategic Advisory Board for UKRI (United Kingdom)
In person / Livestream: 10 October 2021 • 15:35 - 16:05 China Standard Time
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The UK through a mix of government and industry funding has committed more than £1Bn over 10 years to a coordinated programme in quantum technology. Seven years into this programme I will describe here how we got there, and our goals for the future. The UK National Quantum Technology Programme has induced a step change in the UK’s capabilities for pushing forward a new sector in future information technologies. I describe how the programme arose and the activities it supported and influenced to deliver these new capabilities, building on a first phase almost £480M investment across several UK government agencies. The UK programme is now in its second phase, with a further substantial investment by UK government and global industries in the UK making a total of over £1Bn. I will describe our plans for ensuring the advanced quantum science and demonstrator platforms in imaging, sensing, communications and computing developed over the past seven years will drive the formation of the QT sector and embed quantum tech in a broad range of industries. References 1. “Blackett Review: The Quantum Age: technological opportunities.” Government Office for Science, Available: https://www.gov.uk/government/publications/quantum-technologies-blackett-review; https://uknqt.ukri.org/files/strategicintent2020/; Peter Knight and Ian Walmsley 2019 Quantum Sci. Technol. 4 040502
Break
Tea/Coffee Break 16:20 - 16:30
Session 2: Imaging and Sensing II
In person: 10 October 2021 • 16:30 - 17:45 China Standard Time
Session Chair: Mingjiang Zhang, Taiyuan Univ. of Technology (China)
11902-5
Author(s): Junfeng Jiang, Kun Liu, Shuang Wang, Zhe Ma, Guanghua Liang, Yixuan Wang, Tiegen Liu, Tianjin Univ. (China)
On demand | Presented Live 10 October 2021
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Distributed acoustic sensing (DAS)technology has unique advantage in diverse applications, such as seismology, mineral exploration, and so on. We explored the methods to increase measurement range, distance and speed, which are the most important requirement for field deployment. Heterogeneous sideband linear frequency modulated optical pulse with different frequency modulated bandwidth was used to realize simultaneous measurement of acoustic events in different dynamic ranges. Weak fiber Bragg gratings and phase of constructed single frequency were proposed for long distance sensing. Fast processing algorithm based on a graphics processing unit (GPU) for a linear frequency modulation pulse demodulation was realized. The experiment results verified our methods well.
11902-6
Author(s): Xinwei Wang, Liang Sun, Pingshun Lei, Jianan Chen, Jun He, Yan Zhou, Institute of Semiconductors (China)
On demand | Presented Live 10 October 2021
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High-resolution 3D optical imaging is important for unmanned underwater vehicles (UUVs) in the applications of target detection and recognition, underwater engineering, automatic navigation, scientific research, and natural re-sources exploration. Compared with stereo camera and 3D laser scanning imaging, 3D range-gated imaging (3D RGI) has longer detection range and high-er spatial resolution at the same time. This paper presents a survey on 3D range-gated imaging methods for underwater detection. Up to now, there are two main methods developed, including time slicing method and gated range-intensity correlation method. The literature about 3D RGI has been reviewed in different detection applications for UUV. We also introduce our works in 3D gated range-intensity correlation imaging for fishing net detection and marine life in-situ detection. This paper is beneficial for the 3D RGI technique in underwater detection applications for UUV.
Session 3: Biomedical Imaging and Sensing
In person: 11 October 2021 • 09:00 - 11:50 China Standard Time
Session Chair: Bo Li, Fudan Univ. (China)
11902-11
Author(s): Yujie Xiao, Fudan University (China); Bo Li, Fudan Univ. (China)
On demand | Presented Live 11 October 2021
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The performance of multiphoton brain imaging is ultimately limited by the average power that can be delivered to the specimen, which in turn is limited by heating. We demonstrated an adaptive excitation source that is realized by pulse intensity modulation. By only illuminating the region of interest, the adaptive excitation source leads to a 30-fold reduction in the power requirement for two- or three-photon imaging of brain activity in awake mice for improved high-speed longitudinal neuroimaging.
Tea/Coffee Break 10:15 - 10:45
Break
Lunch Break 11:50 - 13:30
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
11902-40
Author(s): Yuhan Yao, Yuhe Zhao, Jianji Dong, Huazhong Univ. of Science and Technology (China)
On demand | Presented Live 11 October 2021
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Photonic integrated circuits (PICs) play an important role in transporting and processing analog information. Reconfigurable optical computing chip can meet the needs of implementing miniaturized and multi-functional signal processors which has become a research hotspot in recent years. Here, we designed and fabricated a reconfigurable photonic integrated computing chip based on a quadrilateral MZI topology network. Several analog signal processing functions including temporal differentiation, integration and Hilbert transformation are experimental demonstrated with a processing bandwidth of 40 GHz. By reconfiguring optical path and changing the spectral ratio of the MZI structure in the network, the functions can be switched and the operation order can be tuned. The quadrilateral network is universal and can be extended to a larger network structure in the future.
11902-41
Author(s): Huibo Hong, National Time Service Ctr. (China), Univ. of Chinese Academy of Sciences (China); Ruiai Quan, National Time Service Center, Chinese Academy of Sciences (China), University of Chinese Academy of Sciences (China); Xiao Xiang, Yuting Liu, Junjie Xing, Peng Liu, Mingtao Cao, Tao Liu, Ruifang Dong, Shougang Zhang, National Time Service Center (China), University of Chinese Academy of Sciences (China)
On demand | Presented Live 11 October 2021
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In this paper, a two-way quantum time transfer over 50 km fiber links with the same frequency standard was implemented, with a short-term stability of 2.63 ps at an averaging time of 18 s and a long-term stability of 79.2 fs at 73700 s. The system accuracy in terms of the 50km fiber transfer length is measured as 524.75 ps, the agreement of which with the theoretical simulation illustrates that improving the spectral similarity of the two entangled sources will significantly improve the accuracy. This result shows that the fiber-optic two-way quantum time transfer can be successfully extended to a Metropolitan fiber link distance of around 50 km or longer, not only maintaining the transfer stability well below picosecond but also promising further improvements in synchronization accuracy.
11902-42
Author(s): Chenji Guo, Xunhua Huang, Yuanyuan Hao, Nanjing Normal Univ. (China); Huali Lu, Nanjing Normal University (China); Hua Zhao, Nanjing Normal Univ. (China)
On demand | Presented Live 11 October 2021
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In this study, a modified OAM Mach-Zehnder (M-Z) interferometer for displacement measurement has been proposed and experimentally proved, where two conjugate OAM beams propagate on two arms respectively. The traditional M-Z OAM interferometer was modified by introducing a reflection module in the reference arm. As a result, the optical path shift mismatched reflections on two arms is eliminated, which improves the quality of the petal-like pattern produced by the interference between two conjugate OAM beams. And a significant rotation angle of the petal-like pattern vs. the tiny displacement of the tested object can be clearly observed. By accurately measuring the rotation angle of the petal-like pattern, a tiny displacement ranging from 50 to 800 nm with resolution of ~50 pm has been measured successfully.
11902-43
Author(s): Xiangrui Tian, Lingjie Zhang, Huan Tian, 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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We proposed and experimentally demonstrated a Fourier domain mode locking (FDML) OEO to generate LFM-Costas waveform in this paper. The kernel of the proposed scheme is a tunable frequency-sweeping microwave photonic filter based on stimulated Brillouin scattering effect and phase-modulation-to-intensity-modulation conversion. In the experiment, the generated LFM-Costas waveform with a frequency range from 8.020 GHz to 8.820 GHz has the same Costas sequence, chirp rate and period as the input signal. The FWHM of the compressed pulse after autocorrelation calculations is about 1.80 ns, and the compression ratio is about 11327. After cross-correlation calculations with different-period output waveforms, the FWHM is about 0.008μs and the compression ratio is about 2548.75. Correspondingly, the compression ratio of the input signal is about 147.75. It verifies that the SBS-based FDML-OEO optimizes the phase coherence of the LFM-Costas waveform from a voltage-controlled oscillator.
11902-45
Author(s): Hua Liu, Luoyang Electro-optical Equipment Research Institute (China); Zhaoyang WANG, Science and Technology on Electro-optic Control Laboratory, China (China)
On demand | Presented Live 11 October 2021
11902-46
Author(s): Yuanli Yue, Univ. of Kent (United Kingdom); Shuo Li, Tianjin Univ. of Technology (China); Yue Feng, Univ. of Kent (United Kingdom), Harbin University of Science and Technology (China); Ailing Zhang, Tianjin Univ. of Technology (China); Chao Wang, Univ. of Kent (United Kingdom)
On demand | Presented Live 11 October 2021
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Real-time identification of frequency-hopping millimeter-wave (mm-wave) signals is a real challenge, due to the high demand for detection bandwidth and processing speed. In this paper, we propose and demonstrate a novel microwave photonic approach to identifying frequency hopping of mm-wave signals based on the concepts of photonic time stretch (PTS) and Reservoir Computing (RC). The PTS scheme allows the modulated signal to be slowed down hence reducing the required detection bandwidth. The developed RC model offers unique features such as being more efficient and time-saving in temporal data pattern classification than traditional methods.
11902-47
Author(s): Jianheng Qiu, Liang Zhang, Heming Wei, Yana Shang, Jianxiang Wen, Shanghai Univ. (China); Fufei Pang, Shanghai Univ (China)
On demand | Presented Live 11 October 2021
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Vortex beams have attracted attention due to their unique properties and wide application. A novel scheme of generating the first-order OAM modes based on anti-resonant reflecting guidance mechanism in RCF is proposed and experimentally demonstrated. Anti-resonant reflecting guidance mechanism in RCF can be simply introduced by directly fusion splicing with the standard single-mode fiber (SMF). Correspondingly, the excited modes can transmit inside the central core of the RCF with low refractive index, which has a Gaussian spot distribution (defined as the anti-resonant mode, AR mode). Because of different mode coupling coefficients, the AR mode can be coupled to the HE11 and HE21 modes through exerting pressure on the RCF, respectively. By adjusting the polarization state and applying the pressure on the fiber, OAM modes of both the positive (L = +1) and negative (L = − 1) can be separately generated with efficiencies of 61.28% and 61.9%, respectively.
11902-48
Author(s): Zhidi Liu, Nan Zeng, Wei Guo, Hui Ma, Tsinghua Univ. Shenzhen International Graduate School (China)
On demand | Presented Live 11 October 2021
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Nebulization therapy is a common treatment for respiratory diseases. The particle size distribution and physicochemical properties of the atomized droplets of different nebulizers have a great impact on the treatment. This study employs a polarization measurement system to obtain the real time and online multi-angle polarization scattering signals of droplets. During the atomization experiments of various drugs, multidimensional polarization index group for individual droplet can be recorded one by one, which can be used to retrieve their size and composition. For different liquid medicines, we compared the atomization effects from two nebulizers, ultrasonic nebulizer and compressed air nebulizer. Experimental results confirm that this particle polarization characterization method can become an effective tool to assist doctors to choose a suitable nebulizer to achieve the best therapeutic effect.
11902-49
Author(s): Liang Xu, Lei Zhang, Chen Liu, Lun Li, Chi Zhang, Xinliang Zhang, Huazhong Univ. of Science and Technology (China)
On demand | Presented Live 11 October 2021
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Dual-comb spectroscopy has become a powerful tool for spectral analysis because of its ultra-high resolution and fast frame rate. To capture the stable spectrum in the frequency domain, it is essential to lock the repetition frequency and the carrier envelope offset frequency of the mode-lock laser. By introducing a phase-lock loop to a piezoelectric ceramic based cavity, the repetition frequency can be easily synchronized to an external clock. To lock the carrier envelope offset frequency, a phase-shifted fiber Bragg grating with 132-MHz narrow pass band is introduced, and it is capable of filtering out single comb line of each comb. Therefore, the post-calibration signal for carrier envelope offset frequency can be obtained from the beating signal of the filtered adjacent comb lines. Based on this post-calibration scheme, a stabilized dual-comb spectroscopy is proposed and demonstrated with 120-nm observation bandwidth, 1-pm spectral resolution, and 100-Hz acquisition frame rate.
11902-50
Author(s): Qimin Wang, Zhewen Liu, Nanjing Univ. (China); Xing-bang Zhu, The 41st Research Institute of China Electronics Technology Group Corp. (China); Tao Fang, Xiangfei Chen, Nanjing Univ. (China)
On demand | Presented Live 11 October 2021
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Ultra-fast tunable laser array is very important for the integration and performance improvement of a high-speed optical switching system. In this article, the matrix-grating DFB laser array we used is based on REC technology, which is arranged as a 2-by-8 matrix. Based on this, We have designed an excellent high-speed drive circuit to provide the laser array with a drive current that can control channel switching. The experimental results show that the channel spacing of 16 channels is 100G, and the side mode suppression ratio and power of each channel are above 40dB and 2mW respectively. In addition, the switching time of the two channels is less than 20 nanoseconds, and during the switching process, the centre wavelength drift of each channel meets the WDM requirements under the ITU-T standard.
11902-51
Author(s): Junhao Zhu, Kangning Yu, Gaopeng Xue, Qian Zhou, Xiaohao Wang, Xinghui Li, Tsinghua Univ. Shenzhen International Graduate School (China)
On demand | Presented Live 11 October 2021
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The signal filtering of the grating encoder is significant to the measurement accuracy, aiming at eliminating the background noise potentially from temperature changes, airflow fluctuations, and mechanical vibrations. The empirical mode decomposition (EMD) algorithm owing to its without basis functions and high adaptability, is widely applied for signal decomposition. We extended the EMD algorithm for signal filtering in a grating encoder, showing a small measurement error of 6.2 μm compared with the results of the laser interferometer. In contrast with the traditional filtering method, our proposed EMD algorithm exhibits a stable, accurate, and real-time calculation performance applicable for the grating encoder.
11902-52
Author(s): Ji Dai, Zhen Li, Pan Dai, Tao Fang, Feng Wang, Xiangfei Chen, Nanjing Univ. (China)
On demand | Presented Live 11 October 2021
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A multi-channel simultaneous wavelength-swept DFB laser array based on reconstruction-equivalent-chirp (REC) technique is proposed and manufactured. The REC technology simplifies the fabrication process and greatly reduces the cost of the laser. The laser array contains 4 lasers in parallel with integrated heating resistance for thermal tuning to broaden the wavelength-tuning range.The driving circuits of laser uses FPGA to control the DAC chip to obtain precise current output, and realizes continuous linear output of wavelength by changing the injection current size. The packaged laser module can realize continuous wavelength-swept range of 2.4 nm per channel with the SMSR over 40 dB, achieving simultaneous sweep of four channels with good scanning linearity and scanning speed. The work in this article creates the conditions for a low-cost, small-volume multi-channel sensing system in the future.
11902-54
Author(s): Ruolan Wang, Liao Chen, Xinliang Zhang, Chi Zhang, Huazhong Univ. of Science and Technology (China)
On demand | Presented Live 11 October 2021
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In this paper, we proposed an ultrafast autocorrelator based on broadband RF analysis system and carried out the simulation verification. In the RF analysis system, the RF spectrum is firstly transformed to the continuous wave probe’ optical spectrum via the cross-phase modulation (XPM). Subsequently, the mapping optical spectrum of the probe is filtered out and then mapped to the time domain through large dispersion. Finally, the mapped RF spectrum is detected and sampled by the real-time sampling system and performed inverse Fourier transformed to obtain the autocorrelator with a frame rate of 50 MHz, a resolution of 300 fs and a measurement range of 600 ps.
Session 4: Advanced Lasers and Applications
In person: 11 October 2021 • 14:30 - 16:50 China Standard Time
Session Chair: Muguang Wang, Beijing Jiaotong Univ. (China)
Tea/Coffee Break 15:20 - 15:35
11902-17
Author(s): Laiyang Dang, Tao Zhu, Chongqing Univ. (China)
On demand | Presented Live 11 October 2021
Session 5: Signal Processing
In person: 12 October 2021 • 08:00 - 10:05 China Standard Time
Session Chairs: Cheng Lin Gu, East China Normal Univ. (China), Chengbo Mou, Shanghai Univ. (China)
11902-23
Author(s): Chengliang Zhu, Lei Wang, Yong Zhao, Northeastern Univ. (China); Hongpu Li, Shizuoka Univ. (Japan)
On demand | Presented Live 12 October 2021
11902-24
Author(s): Di Zheng, Xihua Zou, Chengming Luo, Xiuwen Zhang, Jing Li, Southwest Jiaotong Univ. (China)
On demand | Presented Live 12 October 2021
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Microwave photonic filter (MPF) based interrogation solutions have attracted considerable research interest, through the sensing information conversion from the optical domain to the microwave domain and high-resolution electrical spectrum analyzing processing techniques. In order to overcome the trade-off between measurement accuracy and interrogation speed existing in the traditional direct-detection method, an efficient machine learning algorithm is introduced into the MPF-based interrogation system. Compared with the traditional direct-detection method, the proposed method can achieve better measurement accuracy under the sparsely sampled frequency response, whilst the interrogation speed is greatly improved. In addition, the well-trained model has strong adaptability to the amplitude variation of the microwave photonic filtering response.
Break
Tea/Coffee Break 10:05 - 10:30
Session 6: Photonic Measurement I
In person: 12 October 2021 • 10:30 - 11:50 China Standard Time
Session Chair: Zhiyao Zhang, Univ. of Electronic Science and Technology of China (China)
11902-27
Author(s): Mengke Wang, Yutong He, Zhao Liu, Yali Zhang, Zhiyao Zhang, Shangjian Zhang, Yong Liu, Univ. of Electronic Science and Technology of China (China)
On demand | Presented Live 12 October 2021
Break
Lunch Break 11:50 - 13:20
Session 7: Photonic Measurement II
In person: 12 October 2021 • 13:20 - 15:00 China Standard Time
Session Chair: Tuanwei Xu, Institute of Semiconductors, Chinese Academy of Sciences (China)
11902-31
Author(s): Muguang Wang, Beilei Wu, Beijing Jiaotong Univ. (China)
On demand | Presented Live 12 October 2021
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High-accuracy and high-speed optoelectronic oscillator (OEO)-based magnetic field and electric current fiber measurement is presented in this paper. Thanks to the Giant-Magnetoresistance Effect and Faraday Effect, the magnetic field and electric current can be transformed to the changes in characteristics of light propagating in optical fiber. Then, the use of OEO can translate the magnetic field and electric current dependent changes in optical domain to the oscillating frequency changes in microwave domain in order to increase the interrogation speed and resolution. The theoretical analysis and principle are investigated systematically. Experimental results are then provided to validate the OEO-enabled magnetic field and electric current measurement techniques.
11902-32
Author(s): Wenjun Zhao, Nanjing Univ. of Aeronautics and Astronautics (China), Hebei Semiconductor Research Institute (China); Xiaoxiao Yao, Nanjing Univ. of Aeronautics and Astronautics (China); Cui Yu, Hebei Semiconductor Research Institute (China); Simin Li, Shilong Pan, Nanjing Univ. of Aeronautics and Astronautics (China)
On demand | Presented Live 12 October 2021
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A photonic transceiver of microwave Doppler frequency shift (DFS) measurement, which possesses the capability of generating a frequency-quadruplicated transmitted signal and evaluating the velocity and the direction of the moving target, is proposed. In the transmitter, the frequency-quadruplicated transmitted signal is generated by beating the optical carrier-suppressed ±2nd sidebands. In the receiver, a low-frequency reference signal is introduced to estimate the sign of the DFS. Compared with other microwave photonic DFS measurement solutions, the proposed approach takes the advantages of generating a high transmitted signal simultaneously, employing a low reference signal, and having no use of optical filter.
11902-33
Author(s): Bin Zhang, Yi Su, Yifeng Chen, Chunjie Sui, Qingdao Univ. of Science and Technology (China)
On demand | Presented Live 12 October 2021
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Simultaneous measurement and visualisation of multi-parameters are crucial in understanding and characterising complex combustion. A measurement technique coupled with deflection tomography and particle image velocimetry was proposed to obtain three-dimensional temperature and velocity fields of swirling combustion. A combustion system was developed to generate a non-premixed swirling flame. Moiré patterns in four view angles and tracer particle images illuminated by volume light source were captured simultaneously using a hybrid measurement system. Three-dimensional temperature and velocity fields were quantitatively reconstructed. The characteristics of swirling combustion were analysed on the bases of visualisations of temperature distribution, velocity distribution and streamlines.
Break
Tea/Coffee Break 15:00 - 15:30
Session 8: Photonic Measurement III
In person: 12 October 2021 • 15:30 - 17:20 China Standard Time
Session Chair: Bin Zhang, Qingdao Univ. of Science and Technology (China)
11902-34
Author(s): Xin Zhao, Beihang Univ. (China)
On demand | Presented Live 12 October 2021
11902-37
Author(s): Zhiyao Zhang, Yaowen Zhang, Lingjie Zhang, Univ. of Electronic Science and Technology of China (China); Ying Xu, Yutong He, UESTC (China); Shangjian Zhang, Yujia Zhang, Yong Liu, Univ. of Electronic Science and Technology of China (China)
On demand | Presented Live 12 October 2021
11902-39
Author(s): Yuwei Zhao, Jintao Fan, Youjian Song, Minglie Hu, Tianjin Univ. (China)
On demand | Presented Live 12 October 2021
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Soliton molecules, exhibiting similarities to molecular-like behavior, have attracted tremendous attention. With the dramatic recent advances in real time spectroscopic techniques as well as time-domain probes, the detailed nature of various soliton molecular has been revealed. Particularly, time-stretch dispersive Fourier transform (DFT) technique has been applied to unveil the complex internal dynamics of bound states. Nevertheless, the observation time frame of such technique is limited to hundreds of micro seconds mainly confined by the storage capability of the real time oscilloscopes, as well as by the number and the distribution of soliton pulses. Here, we experimentally demonstrate a new probing concept, orbital angular momentum (OAM)-resolved method, for visual extraction of long-term internal phase motions within soliton molecules produced by a mode locked laser.
Conference Chair
Ming Li
Institute of Semiconductors, Chinese Academy of Sciences (China)
Conference Chair
UCLA Samueli School of Engineering (United States)
Conference Chair
Loyola Marymount Univ. (United States), Tachyonics Inc. (United States)
Program Committee
Tsinghua Univ. (China)
Program Committee
Nanjing Univ. (China)
Program Committee
Huazhong Univ. of Science and Technology (China)
Program Committee
National Time Service Ctr., Chinese Academy of Sciences (China)
Program Committee
Harbin Institute of Technology (China)
Program Committee
Shanghai Jiao Tong Univ. (China)
Program Committee
The Univ. of Georgia (United States)
Program Committee
Zhejiang Univ. (China)
Program Committee
Tianjin Univ. (China)
Program Committee
KAIST (Korea, Republic of)
Program Committee
Shizuoka Univ. (Japan)
Program Committee
Xueming Liu
Zhejiang Univ. (China)
Program Committee
Univ. of Electronic Science and Technology of China (China)
Program Committee
Shanghai Univ. (China)
Program Committee
Shanghai Univ. (China)
Program Committee
Southern Univ. of Science and Technology of China (China)
Program Committee
Peking Univ. (China)
Program Committee
Shanghai Jiao Tong Univ. (China)
Program Committee
The Univ. of Hong Kong (Hong Kong, China)
Program Committee
Univ. of Kent (United Kingdom)
Program Committee
Jian Wang
Huazhong Univ. of Science and Technology (China)
Program Committee
Heriot-Watt Univ. (United Kingdom)
Program Committee
Nanjing Univ. (China)
Program Committee
Kun Xu
Beijing Univ. of Posts and Telecommunications (China)
Program Committee
Henan Univ. of Science and Technology (China)
Program Committee
Shanghai Jiao Tong Univ. (China)
Program Committee
Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences (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
Nanjing Normal Univ. (China)
Program Committee
Tsinghua Univ. (China)
Program Committee
Zheng Zheng
Beihang Univ. (China)
Program Committee
Chongqing Univ. (China)
Program Committee
Southwest Jiaotong Univ. (China)
Additional Information

CLOSED


this conference is no longer accepting abstract submissions.

POST-DEADLINE ABSTRACT SUBMISSIONS

  • Submissions were accepted through 30-August
  • Notification of acceptance by 6-September

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