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

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

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PON Monitoring Method Based on Novel optical Visual Splitter

PON Monitoring Method Based on Novel Optical Visual Splitter

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Asia communications and Photonics Conference and Exhibition (ACP)

作者： Songlin Zhu Yidai Zhu Xinyu Fan Zuyuan He Wireline Product Planning Department ZTE Corporation Shanghai China State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai China

We propose a novel visual optical splitter used in passive optical network (PON) architecture to realize PON monitoring with the help of a multi-wavelength optical time domain reflectometry (OTDR), which reduce 10 dB ... 详细信息

ISBN: (数字)9798350379266

ISBN: (纸本)9798350379273

关键词： Visualization optical attenuators Reflectometry Attenuation Passive optical networks optical sensors optical reflection Time-domain analysis Monitoring Photonics

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Protection of optical channels and non-classical sources using dynamic modulation

Protection of optical channels and non-classical sources usi...

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CLEO: Science and Innovations in CLEO 2024, CLEO: S and I 2024 - Part of Conference on Lasers and Electro-Optics

作者： Jiang, Ze-Kun Wang, Li Wang, Chang-Shun Solntsev, Alexander S. Jin, Xian-Min School of Physics and Astronomy State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai200240 China CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of China Anhui Hefei230026 China School of Physics and Astronomy State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai200240 China School of Mathematical and Physical Sciences University of Technology Sydney UltimoNSW Australia TuringQ Co. Ltd. Shanghai200240 China

A method for protecting optical channels and non-classical sources in integrated photonic systems using dynamic modulation is proposed, which provides higher design freedom and scalability than topological protection ... 详细信息

关键词： Photonic integrated circuits

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Protection of optical channels and non-classical sources using dynamic modulation

Protection of optical channels and non-classical sources usi...

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2024 Conference on Lasers and Electro-Optics, CLEO 2024

ISBN: (纸本)9781957171395

关键词： Signal modulation

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A low-fabrication-temperature, high-gain chip-scale waveguide amplifier

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Science China(Information Sciences) 2022年第6期65卷 247-255页

作者： Bo WANG Peiqi ZHOU Xingjun WANG Yandong HE State Key Laboratory of Advanced Optical Communication Systems and Networks Department of ElectronicsSchool of Electronics Engineering and Computer Science Peking University Institute of Microelectronics School of Electronics Engineering and Computer Science Peking University Frontier Science Center for Nano-optoelectronics Peking University Peking University Yangtze Delta Institute of Optoelectronics Peng Cheng Laboratory

The increasing prevalence of integrated on-chip optoelectronic devices has identified serious issues regarding inter-device transmission and coupling losses, highlighting an urgent need for on-chip waveguide amplifiers to compensate for these losses. Compared with other Er-based optical materials, erbium silicate is ideally suited to high-efficiency on-chip amplifiers and lasers because of its extremely high Er3+concentration(1022cm-3). Nevertheless, erbium silicate must be annealed above 1000℃ to crystallize and activate the Er3+, which damages other on-chip optoelectronic components and is not conducive to device ***, we report a low-fabrication-temperature, high-luminescence-efficiency gain material by adding Bi2O3to an erbium-ytterbium silicate mixed film. Our experiments demonstrate that the proposed film crystallizes at 600℃ while the activation of Er3+is also achieved, which is the lowest activation temperature of on-chip waveguide amplifier to our knowledge. This material forms the basis for a new chip-scale waveguide amplifier design, with a theoretical multi-energy-level model of Bi-Er-Yb in the mixed thin films used to analyze its signal enhancement properties. We achieve a peak on-chip gain of 23 dB in a 3.3-mm-long waveguide under the pump and signal powers of 300 mW and 1 μW, respectively. These results highlight the potential of the proposed material for realizing on-chip amplifiers and lasers for large-scale nanophotonic integrated circuits.

关键词： photonic circuit integration low fabrication temperature high gain rare earth material waveguide amplifier

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Net 4×500Gb/s IM/DD optical interconnects with interleaved PDM and probabilistic shaping

Net 4×500Gb/s IM/DD optical interconnects with interleaved ...

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49th European Conference on optical communications (ECOC 2023)

作者： X. Fang Y. Zhu X. Chen X. Cai W. Hu F. Zhang State Key Laboratory of Advanced Optical Communication System and Networks Frontiers Science Centre for Nano-optoelectronics School of Electronics Peking University Beijing 100871 People's Republic of China State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai 200240 People's Republic of China

We propose an interleaved PDM WDM IM/DD scheme avoiding carrier fading with only one optical filter and one photodiode per polarization. With probabilistic shaping, we demonstrate 4×500Gb/s IM/DD interconnects of...

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Low-modal-crosstalk doped-fiber amplifiers in few-mode-fiber-based systems

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Photonics Research 2024年第8期12卷 1768-1775页

作者： SHUAILUO HUANG LEI SHEN GANG QIAO YUANPENG DING YUYANG GAO JIAN CUI BAOLONG ZHU SIYUAN LIU MINGQING ZUO JINGLONG ZHU LEI ZHANG JIE LUO YONGQI HE ZHANGYUAN CHEN JUHAO LI State Key Laboratory of Advanced Optical Communication Systems and Networks Peking UniversityBeijing 100871China State Key Laboratory of Optical Fiber and Cable Manufacture Technology Yangtze Optical Fibre and Cable Joint Stock Limited CompanyWuhan 430073China School of Computer and Communication Engineering University of Science and Technology BeijingBeijing 100083China Department of Networks China Mobile Communications Group Co.Ltd.Beijing 100033China Department of Fundamental Network Technology China Mobile Research InstituteBeijing 100053China Pengcheng Laboratory Shenzhen 518055China

Independent light propagation through one or multiple modes is commonly considered as a basic demand for mode manipulation in few-mode fiber(FMF)-or multimode fiber(MMF)-based optical systems such as transmission links,optical fiber lasers,or distributed optical fiber ***,the insertion of doped-fiber amplifiers always kills the entire effort by inducing significant modal *** this paper,we propose the design of doped-fiber amplifiers in FMF-based systems adopting identical multiple-ring-core(MRC)index profiles for both passive and doped fibers to achieve low modal *** develop the direct-glass-transition(DGT)modified chemical vapor deposition(MCVD)processing for precise fabrication of few-mode erbium-doped fibers(FM-EDFs)with MRC profiles of both refractive index and erbium-ion doping ***,a few-mode erbium-doped-fiber amplifier(FM-EDFA)with a maximum gain of 26.08 dB and differential modal gain(DMG)of 2.3 dB is realized based on fabricated FM-EDF matched with a transmission FMF supporting four linearly polarized(LP)*** the insertion of the FM-EDFA,60+60 km simultaneous LP_(01)∕LP_(11)∕LP_(21)∕LP_(02)transmission without inter-modal multiple-input multiple-output digital signal processing(MIMO-DSP)is successfully *** proposed design of low-modal-crosstalk doped-fiber amplifiers provides,to our knowledge,new insights into mode manipulation methods in various applications.

关键词： fiber crosstalk amplifiers

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Optics-Informed Fully Convolutional networks for Enhanced Channel Equalization in High-Speed VCSEL-Based optical Interconnects

Optics-Informed Fully Convolutional Networks for Enhanced Ch...

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2024 Asia communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and optical communications, IPOC 2024

作者： Xu, Yuting Yang, Chuanchuan Xu, Zhaopeng Qin, Hao Tang, Jianwei Zhao, Yuping Pengcheng Laboratory Peking University Shenzhen China Peking University Shenzhen Graduate School Peking University Shenzhen China State Key Laboratory of Advanced Optical Communication Systems and Networks Peking University Beijing China Department of Circuits and Systems Pengcheng Laboratory Shenzhen China School of Electronics Peking University Beijing China

This paper proposes an optics-informed fully convolutional network equalizer for high-speed VCSEL-based optical interconnects. The proposed method demonstrates significant performance improvements across different tra... 详细信息

ISBN: (纸本)9798350379266

关键词： Equalizers

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Compact optical Frequency Standard Based on87Rb D1 Line 37

Compact Optical Frequency Standard Based on87Rb D1 Line

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37th European Frequency and Time Forum, EFTF 2024

作者： Chen, Jingming Miao, Jie Yang, Qiaohui Liu, Tianyu Chen, Zhendong Pan, Duo Lian, Jiqing Chen, Jingbiao School of Electronics Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks Beijing100871 China Lanzhou Institute of Physics Science and Technology on Vacuum Technology and Physics Laboratory Lanzhou730000 China School of Mechano-Electronic Engineering Xidian University Xi'an710071 China Hefei National Laboratory Hefei China

ISBN: (纸本)9798350354270

In this paper, we investigate the modulation transfer spectroscopy (MTS) of 87Rb D1 line under noncycling transitions. The line shape of the MTS signal was determined, and the system's long-term stability was measured. Results showed that the system consistently performed at a short-term and long-term stability of E-14 level estimated from the residual error signal, indicating high performance of the compact optical frequency standard. © 2024 IEEE.

关键词： Signal modulation

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Compact generation scheme of path–frequency hyperentangled photons using 2D periodical nonlinear photonic crystal

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Chinese Physics B 2023年第12期32卷 256-262页

作者：陈洋河季波李念芹姜震李维李昱东冯梁森武腾飞何广强 SJTU Pinghu Institute of Intelligent Optoelectronics Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China Science and Technology on Metrology and Calibration Laboratory Changcheng Institute of Metrology&MeasurementAviation Industry Corporation of ChinaBeijing 100095China

Hyperentanglement is a promising resource for achieving high capacity quantum ***,we propose a compact scheme for the generation of path-frequency hyperentangled photon pairs via spontaneous parametric down-conversion(SPDC)processes,where six different paths and two different frequencies are covered.A two-dimensional periodicalχ^((2))nonlinear photonic crystal(NPC)is designed to satisfy type-Ⅰquasi-phase-matching conditions in the plane perpendicular to the incident pump beam,and a perfect phase match is achieved along the pump beam's direction to ensure high conversion efficiency,with theoretically estimated photon flux up to 2.068×10^(5) pairs·s^(-1)·mm^(-2).We theoretically calculate the joint-spectral amplitude(JSA)of the generated photon pair and perform Schmidt decomposition on it,where the resulting entropy S of entanglement and effective Schmidt rank K reach 3.2789 and 6.4675,*** hyperentangled photon source scheme could provide new avenues for high-dimensional quantum communication and high-speed quantum information processing.

关键词： hyperentanglement nonlinear photonic crystal quasi-phase-matching

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