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基于马赫-曾德尔干涉仪的1×8硅基热光开关

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光学学报 2024年第8期44卷 115-124页

作者：高小勇刘阳阳胡光熹陆梁军罗海梅江西师范大学江西省光电子与通信重点实验室江西南昌330022 上海交通大学平湖智能光电研究院浙江平湖314200

设计并制备了一种基于树形结构的1×8硅基热光开关,该热光开关由1个2×2和6个1×2马赫-曾德尔干涉仪的基本单元结构组成。该1×8硅基热光开关采用与互补金属氧化物半导体兼容的工艺制造。通过氮化钛加热器来改变波导的温度,利用硅的热... 详细信息

设计并制备了一种基于树形结构的1×8硅基热光开关,该热光开关由1个2×2和6个1×2马赫-曾德尔干涉仪的基本单元结构组成。该1×8硅基热光开关采用与互补金属氧化物半导体兼容的工艺制造。通过氮化钛加热器来改变波导的温度,利用硅的热光效应实现光开关功能。实验结果表明:在1550 nm工作波长下,该热光开关的平均片上插入损耗约为1.1 dB;所有输出端口的串扰都小于-23.6 dB;开关响应时间小于60μs。

关键词：集成光学硅基开关马赫-曾德尔干涉仪热光开关

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Low temperature sensitivity on-chip Fouriertransform spectrometer based on dual-layer Si_(3)N_(4)spiral waveguides

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Photonics Research 2023年第4期11卷 591-599页

作者： liangjun lu HONGYI ZHANG XIN LI JIANPING CHEN LINJIE ZHOU State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Laboratory of Navigation and Location ServicesDepartment of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu 314200China

On-chip Fourier-transform spectrometers(FTSs)based on Mach–Zehnder interferometer(MZI)arrays suffer from severe central wavelength and fringe contrast variation due to fabrication *** though a calibration matrix can be employed to correctly retrieve the input spectra,environmental temperature variation greatly degrades the retrieving *** this paper,we devise a dual-layer Si_(3)N_(4) waveguide interferometer to reduce the temperature *** beating of the even and odd supermodes in the dual-layer waveguide generates periodic intensity fluctuations in the *** these two modes have similar modal profiles,their thermal sensitivity and propagation loss are relatively balanced,leading to a low temperature sensitivity and a high interference extinction *** designed and fabricated a passive FTS based on a 32-channel dual-layer Si_(3)N_(4) waveguide *** results show that the temperature sensitivity is reduced to 10 pm/°C,which is almost half that of single-layer Si_(3)N_(4) MZI-based *** this chip,we accurately reconstructed various types of optical spectra,including single and two sparse laser lines,and broadband optical *** method can fit a wide wavelength range,which is a promising technology to improve the practical applications of on-chip FTSs.

关键词： waveguide interferometer layer

Ultra-low-loss multi-layer 8×8 microring optical switch

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Photonics Research 2023年第5期11卷 712-723页

作者： XIN LI WEI GAO liangjun lu JIANPING CHEN LINJIE ZHOU State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Laboratory of Navigation and LocationServicesShanghai Institute for Advanced Communication and Data ScienceDepartment of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu 314200China

Microring-based optical switches are promising for wavelength-selective switching with the merits of compact size and low power ***,the large insertion loss,the high fabrication,and the temperature sensitivity hinder the scalability of silicon microring optical switch *** this paper,we utilize a three-dimensional(3D)microring-based optical switch element(SE)on a multi-layer Si_(3)N_(4)-on-SOI platform to realize highperformance large-scale optical switch *** 3D microring-based SE consists of a Si∕Si_(3)N_(4) waveguide overpass crossing in the bottom and the top layers,and Si_(3)N_(4) dual-coupled microring resonators(MRRs)in the middle *** switch is calibration-free and has low insertion *** the 3D microring-based SEs,we implement an 8×8 crossbar optical switch *** the resonance wavelengths of all SEs are well aligned,only one SE needs to be turned on in each routing path,which greatly reduces the complexity of the switch *** optical transmission spectra show a box-like shape,with a passband width of~69 GHz and an average on-state loss of~0.37 *** chip has a record-low on-chip insertion loss of 0.52-2.66 *** also implement a non-duplicate polarization-diversity optical switch by using the bidirectional transmission characteristics of the crossbar architecture,which is highly favorable for practical applications.100 Gb/s dual-polarization quadrature-phase-shift-keying(DP-QPSK)signal is transmitted through the switch without significant *** the best of our knowledge,this is the first time that 3D MRRs have been used to build highly scalable polarization-diversity optical switch fabrics.

关键词： polarization microring optical

Continuous-variable quantum key distribution with on-chip light sources

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Photonics Research 2023年第4期11卷 504-516页

作者： LANG LI TAO WANG XINHANG LI PENG HUANG YUYAO GUO liangjun lu LINJIE ZHOU GUIHUA ZENG State Key Laboratory of Advanced Optical Communication Systems and Networks Center for Quantum Sensing and Information ProcessingDepartment of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China Shanghai Research Center for Quantum Sciences Shanghai 201315China State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Laboratory of Navigation and Location ServicesDepartment of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu 314200China

Integrated quantum key distribution(QKD)systems based on photonic chips have high scalability and stability,and are promising for further construction of global quantum communications ***-chip quantum light sources are a critical component of a fully integrated QKD system;especially a continuous-variable QKD(CVQKD)system based on coherent detection,which has extremely high requirements for the light ***,for what we believe is the first time,we designed and fabricated two on-chip tunable lasers for CV-QKD,and demonstrated a high-performance system based on these *** of the high output power,fine tunability,and narrow linewidth,the involved on-chip lasers guarantee the accurate shot-noise-limited detection of quantum signals,center wavelength alignment of nonhomologous lasers,and suppression of untrusted excess *** system’s secret key rate can reach 0.75 Mb/s at a 50 km fiber distance,and the secure transmission distance can exceed 100 *** results mark a breakthrough toward building a fully integrated CV-QKD,and pave the way for a reliable and efficient terrestrial quantum-secure metropolitan area network.

关键词： quantum sources distribution

4×4 nonblocking optical switch fabric based on cascaded multimode interferometers

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Photonics Research 2016年第1期4卷 21-26页

作者： Zuxiang Li Linjie Zhou liangjun lu Shuoyi Zhao Dong Li Jianping Chen State Key Laboratory of Advanced Optical Communication Systems and Networks Department of ElectronicEngineering Shanghai Jiao Tong University

We experimentally demonstrate a 4 × 4 nonblocking silicon thermo-optic(TO) switch fabric consisting of three stages of tunable generalized Mach–Zehnder interferometers. All 24 routing states for nonblocking switching are characterized. The device's footprint is 4.6 mm × 1.0 mm. Measurements show that the worst cross talk of all switching states is-7.2 dB. The on-chip insertion loss is in the range of 3.7–13.1 dB. The average TO switching power consumption is 104.8 mW.

关键词： nonblocking optical switch fabric based on cascaded multimode interferometers OOK Figure

16 × 16 silicon Mach–Zehnder interferometer switch actuated with waveguide microheaters

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Photonics Research 2016年第5期4卷 202-207页

作者： Shuoyi Zhao liangjun lu Linjie Zhou Dong Li Zhanzhi Guo Jianping Chen State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University

We experimentally demonstrate a 16 × 16 reconfigurably nonblocking optical switch fabric using a Benes architecture. The switch fabric consists of 56 2 × 2 Mach–Zehnder interferometer based elementary switches, with each integrated with a pair of waveguide microheaters. The average on-chip insertion loss is ~5.2 dB for both of the 'all-cross' and the 'all-bar' states, with a loss variation of 1 dB over all routing paths. The cross talk for all switching states is better than -30 d B. The switching time of the switch element is about 22 μs. The switching functionality is verified by transmission of a 40 Gb∕s quadrature phase-shift keying optical signal.

关键词： MZI Zehnder interferometer switch actuated with waveguide microheaters silicon Mach

Optical generation of UWB pulses utilizing Fano resonance modulation

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Frontiers of Optoelectronics 2021年第4期14卷 426-437页

作者： Zhe XU Yanyang ZHOU Shuhuang CHEN liangjun lu Gangqiang ZHOU Jianping CHEN Linjie ZHOU State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Laboratory of Navigation and Location ServicesShanghai Institute for Advanced Communication and Data ScienceDepartment of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China

In this paper,we reported an integrated method to generate ultra-wideband(UWB)pulses of different orders based on a reconfigurable silicon micro-ring resonator-coupled Mach–Zehnder *** proper operating conditions,the device can produce Fano resonances with a peak-to-valley extinction ratio of above 20 *** monocycle and doublet signals with picosecond pulse widths are produced when the microring resonator is modulated by square and Gaussian electrical pulses,*** our Fano resonance modulator on silicon photonics,it is promising to foresee versatile on-chip microwave signal generation.

关键词： ultra-wideband(UWB)generation Fano resonance intensity modulation integrated silicon modulator

Microwave frequency upconversion employing a coupling-modulated ring resonator

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Photonics Research 2017年第6期5卷 208-213页

作者： YIMING ZHONG LINJIE ZHOU YANYANG ZHOU YUJIE XIA SIQI LIU liangjun lu JIANPING CHEN XINGJUN WANG Shanghai Institute for Advanced Communication and Data Science State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer SciencePeking University

We present a method to generate a frequency-doubled microwave signal by employing a coupling-modulated ring resonator. Critical coupling is achieved when the resonator intrinsic loss is perfectly balanced by the external coupling enabled by a Mach–Zehnder interferometer coupler. The high suppression of the carrier leads to a clean two-tone optical signal with the frequency interval two times larger than that of the input microwave *** beating of the two-tone signal at a photodiode generates the frequency upconverted microwave signal.A theoretical model is established to analyze the modulation process and the microwave signal *** results show that the electrical harmonic suppression ratio is around ~20 dB(29 dB) for an input microwave signal with 5 dBm(10 dBm) power.

关键词： Microwave frequency upconversion employing a coupling-modulated ring resonator MZI

Nonvolatile waveguide transmission tuning with electrically-driven ultra-small GST phase-change material

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Science Bulletin 2019年第11期64卷 782-789页

作者： Hanyu Zhang Linjie Zhou Jian Xu Ningning Wang Hao Hu liangjun lu B. M. A. Rahman Jianping Chen State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Laboratory of Navigation and Location ServicesShanghai Institute for Advanced Communication and Data ScienceDepartment of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China Department of Electrical and Electronic Engineering CityUniversity of LondonLondon EC IV OHBUK

Low-power reconfigurable optical circuits are highly demanded to satisfy a variety of different applications. Conventional electro-optic and thermo-optic refractive index tuning methods in silicon photonics are not suitable for reconfiguration of optical circuits due to their high static power consumption and volatility. We propose and demonstrate a nonvolatile tuning method by utilizing the reversible phase change property of GST integrated on top of the silicon waveguide. The phase change is enabled by applying electrical pulses to the lm-sized GST active region in a sandwich structure. The experimental results show that the optical transmission of the silicon waveguide can be tuned by controlling the phase state of GST.

关键词： Phase change material Nonvolatile optical switch Integrated optics devices Chalcogenide Ge2Sb2Te5