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Advanced Photonics 2024年第1期6卷 115-125页

作者： Bingxin Xu Yangyang Wan Xinyu Fan zuyuan he Shanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication Systems and NetworksDepartment of Electronic EngineeringShanghaiChina Max-Planck Institute of Quantum Optics Hans-Kopfermann-Straûe 185748 GarchingGermany

Spectroscopy is the basic tool for studying molecular physics and realizing biochemical ***,it is challenging to realize sub-femtometer resolution spectroscopy over broad *** and high-resolution spectroscopy with calibrated optical frequency is demonstrated by bridging the fields of speckle pattern and electro-optic frequency comb.A wavemeter based on a whispering-gallery-mode barcode is proposed to link the frequencies of a probe continuous-wave laser and an ultrastable *** ultrafine electro-optic comb lines are generated from the probe laser to record spectrum of sample with sub-femtometer *** bandwidth is a thousandfold broader than comb bandwidth,by sequentially tuning the probe laser while its wavelength is *** approach fully exploits the advantages of two fields to realize 0.8-fm resolution with a fiber laser and 80-nm bandwidth with an external cavity diode *** spectroscopic measurements of an ultrahigh Q-factor cavity and gas molecular absorption are experimentally *** compact system,predominantly constituted by few-gigahertz electronics and telecommunication components,shows enormous potential for practical spectroscopic applications.

关键词： frequency comb reconstructive wavemeter spectroscopy

Silicon photonic integrated interrogator for fiber-optic distributed acoustic sensing

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Photonics Research 2024年第3期12卷 465-473页

作者： ZHICheNG JIN JIAGENG CheN YANMING CHANG QINGWEN LIU zuyuan he State Key Laboratory of Advanced Optical Communication System and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Distributed acoustic sensing(DAS)technology has been a promising tool in various ***,the large size and relatively high cost of DAS equipment composed of discrete devices restrict its further popularization to some degree,and the photonic integration technology offers a potential *** this paper,we demonstrate an integrated interrogator for DAS on the silicon-on-insulator(SOI)*** design of the chip revolves around a Mach–Zehnder modulator(MZM)transmitter and a dual-quadrature and dualpolarization coherent *** integrated interrogator supports multiple DAS schemes,including the time-gated digital optical frequency domain reflectometry(TGD-OFDR),which is adopted for system performance evaluation.59■strain resolution in 12.1km sensing fiber with 1.14 m spatial resolution(SR)is ***,along 49.0 km sensing fiber,81■strain resolution with 3.78 m SR is *** results show that the integrated interrogator has comparable performance to the discrete DAS *** the best of our knowledge,this is the first dedicated on-chip DAS interrogator,which validates the effectiveness of the blend of photonics integration and DAS technology.

关键词： fiber polarization modulator

Waveguide Bragg Grating for Fault Localization in PON

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ZTE Communications 2024年第2期22卷 94-98页

作者： HU Jin LIU Xu ZHU Songlin ZHUANG Yudi WU Yuejun XIA Xiang he zuyuan School of Electronic Information and Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Wireline Product Planning Department ZTE CorporationShanghai 201203China Hangzhou Electric Connector Factory Hangzhou 310052China

Femtosecond laser direct inscription is a technique especially useful for prototyping purposes due to its distinctive advantages such as high fabrication accuracy,true 3D processing flexibility,and no need for mold or *** this paper,we demonstrate the design and fabrication of a planar lightwave circuit(PLC)power splitter encoded with waveguide Bragg gratings(WBG)using a femtosecond laser inscription technique for passive optical network(PON)fault localization *** the reflected wavelengths and intervals of WBGs can be conveniently *** the experiment,we succeeded in directly inscribing WBGs in 1×4 PLC splitter chips with a wavelength interval of about 4 nm and an adjustable reflectivity of up to 70% in the *** proposed method is suitable for the prototyping of a PLC splitter encoded with WBG for PON fault localization applications.

关键词： planar light circuit power splitter waveguide Bragg gratings femtosecond laser optical network fault localization

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基于瑞利散射强度谱动态扩展的大量程分布式光纤传感系统

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光学学报 2024年第11期44卷 259-265页

作者：陈家豪刘庆文常晏铭何祖源上海交通大学区域光纤通信网与新型光通信系统国家重点实验室

基于背向瑞利散射和啁啾脉冲的光纤分布式声传感器实现了动态信号的高性能测量，但其过小的量程限制了准静态信号的测量能力。为此，本文提出了一种基于瑞利频谱解调法的频谱扩展算法，利用光纤受到应变时瑞利散射强度谱发生频移的特点... 详细信息

基于背向瑞利散射和啁啾脉冲的光纤分布式声传感器实现了动态信号的高性能测量，但其过小的量程限制了准静态信号的测量能力。为此，本文提出了一种基于瑞利频谱解调法的频谱扩展算法，利用光纤受到应变时瑞利散射强度谱发生频移的特点，在应变测量过程中动态扩展分布式光纤传感系统的参考频谱频率范围以提高测量量程。在实验中，利用扫频范围为1 GHz的啁啾脉冲，实现了198με应变信号的测量，测量量程相较于无扩展算法时扩大了65倍。

关键词：分布式光纤传感瑞利散射传感量程互相关频谱扩展

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多机理融合分布式光纤传感技术研究

光学学报 2024年第1期44卷 153-164页

作者：黄麟景周霄樊昕昱王峰张旭苹何祖源上海交通大学区域光纤通信网与新型光通信系统国家重点实验室上海200240 南京大学智能光感知与调控技术教育部重点实验室江苏南京210023 南京大学现代工程与应用工程学院江苏南京210023

为了解决传统分布式光纤传感系统只针对单一变量进行测量的问题,研究人员近年来结合多种光纤传感测量机理,提出了一系列多机理融合的分布式光纤传感系统,使用同一系统实现多种参量的测量。综述了近年来多机理融合的分布式光纤传感技术,... 详细信息

为了解决传统分布式光纤传感系统只针对单一变量进行测量的问题,研究人员近年来结合多种光纤传感测量机理,提出了一系列多机理融合的分布式光纤传感系统,使用同一系统实现多种参量的测量。综述了近年来多机理融合的分布式光纤传感技术,从不同散射机理相互结合的角度进行分类,介绍了不同的多机理融合的分布式光纤传感系统及其性能指标,并对其进行总结对比,最后展望了多机理融合的分布式光纤传感技术的发展前景。

关键词：传感器光纤散射多机理光纤光学光纤传感

Simplified single-end Rayleigh and Brillouin hybrid distributed fiber-optic sensing system

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Science China(Information Sciences) 2023年第2期66卷 291-292页

作者： Linjing HUANG zuyuan he Xinyu FAN State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong University Peng Cheng Laboratory

Dear editor,Distributed fiber-optic sensing(DFOS) technology has been widespread applications in many fields. It is mainly realized by analyzing three kinds of backscattering in optical fibers: Rayleigh, Brillouin, and Raman [1]. Conventionally,the sensing system can only measure one type of parameter:a static one like temperature and strain or a dynamic one like vibration. However, for several applications, such as railway safety monitoring systems, both static and dynamic parameters must be measured simultaneously not only for early warning applications but also for collecting static signals to perform long-term analysis.

关键词： Hybrid systems

Sub-femtometer-resolution absolute spectroscopy with sweeping electro-optic combs

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Opto-Electronic Advances 2022年第12期5卷 35-43页

作者： Bingxin Xu Xinyu Fan Shuai Wang zuyuan he State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Optical frequency comb with evenly spaced lines over a broad bandwidth has revolutionized the fields of optical metrology and ***,we propose a fast interleaved dual-comb spectroscopy with sub-femtometer-resolution and absolute frequency,in which two electro-optic frequency combs are ***-modulated stabilized laser enables ultrahigh resolution of 0.16 fm(or 20 k Hz in optical frequency)and single-shot measurement in 90 *** 20 million points are recorded spanning 3.2 nm(or 400 GHz)bandwidth,corresponding to a spectral sampling rate of 2.5×10^(8)points/s under ***,considering the trade-off between the measurement time and spectral resolution,a fast single-shot measurement is also realized in 1.6 ms with 8 fm(or 1 MHz)*** demonstrate the 25-averaged result with 30.6 d B spectral measurement signal-to-noise ratio(SNR)by reducing the filter bandwidth in *** results show great prospect for precise measurement with flexibly fast refresh time,high spectral resolution,and high SNR.

关键词： dual-comb spectroscopy optical frequency comb interferometry

Navigation-grade resonant fiber-optic gyroscope using ultra-simple white-light multibeam interferometry

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Photonics Research 2022年第2期10卷 542-549页

作者： Shuangxiang Zhao Qingwen Liu Yuanyuan Liu Huilian Ma zuyuan he State Key Laboratory of Advanced Communication Systems and Networks Shanghai Jiao Tong UniversityShanghai 200240China School of Aeronautics and Astronautics Zhejiang UniversityHangzhou 310027China

The miniaturization of the gyroscope is critical for spacecrafts,drones,wellbore surveys,*** resonant fiberoptic gyroscope(RFOG)is a competitive candidate due to its potential in both miniaturization and high resolution,while its actual performance is well below expectation because of laser-induced noise and *** we report the first navigation grade RFOG with a bias instability of 0.009°/h and an angle random walk of 0.0093°/√*** results are realized using a fiber resonator with finesse of 63 containing 100-m long *** with the traditional RFOGs using narrow-linewidth lasers,the key feature of the proposed RFOG is that it is driven with a broadband light source.A white-light multibeam interference method is proposed to detect the Sagnac effect,representing the simplest scheme of RFOG to *** complexity caused by multiple feedback loops and coherent noise suppression in traditional RFOG scheme is *** minimal scheme and simple modulation algorithm will also promote the on-chip waveguide gyroscope.

关键词： fiber waveguide resonant

Silicon mode-loop Mach-Zehnder modulator with L-shaped PN junction for 0.37 V·cm V_(π)L high-efficiency modulation

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Photonics Research 2022年第1期10卷 214-221页

作者： JIACheNG LIU GANGQIANG ZHOU JIANGBING DU WEIHONG SheN LINJIE ZHOU zuyuan he State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong UniversityShanghai 200240China Peng Cheng Laboratory Shenzhen 518055China

Optical signaling without a high voltage driver for electric-optic modulation is in high demand to reduce power consumption,packaging complexity,and *** this work,we propose and experimentally demonstrate a silicon mode-loop Mach–Zehnder modulator(ML-MZM) with record-high modulation *** used a mode-loop structure to recycle light twice in the phase *** an L-shaped PN junction,a comparably large overlap between the PN junction and optical modes of both TE0 and TE1 was achieved to lower the driving voltage or decrease the photonic device ***-of-concept high-efficiency modulation with low VπL of 0.37 V · cm was *** Vπcan be realized with a millimeter’s length phase shifter by this scheme,which makes the realization of CMOS-compatible driverless modulation highly possible.40 Gb/s signaling with a bit error rate below the 7% forward-error-correction threshold was then demonstrated with the fabricated ML-MZM,indicating great potential for high-speed optical communication.

关键词： modulator loop millimeter

20736-node weighted max-cut problem solving by quadrature photonic spatial Ising machine

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Science China(Information Sciences) 2023年第12期66卷 289-290页

作者： Xin YE Wenjia ZHANG Shaomeng WANG Xiaoxuan YANG zuyuan he State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Peng Cheng Laboratory

The max-cut problem is one of the fundamental NP-hard problems in combinatorial optimization, which can describe the practical applications such as data clustering, machine scheduling, and image recognition. This prob...

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