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Photonics Research 2018年第10期6卷 965-970页

作者： YUXING YANG ZHENZHEN XU XINHONG JIANG YU HE XUHAN GUO YONG ZHANG CIYUAN QIU YIKAI SU state key laboratory of advanced optical communication systems and networks Department of Electronic EngineeringShanghai Jiao Tong University

We experimentally demonstrate high-efficiency and broadband four-wave mixing in a silicon-graphene strip waveguide. A four-wave mixing conversion efficiency of -38.7 d B and a 3-dB conversion bandwidth of 35 nm are achieved in the silicon-graphene strip waveguide with an optimized light-graphene interaction length of 60 μm. The interaction length is controlled by a windowed area of silica layer on the silicon *** simulations and experimental studies are carried out and show a nonlinear parameter γGOSas large as 10~4 W^(-1)· m^(-1).

关键词：石墨烯频率通讯技术发展现状

A design method for high fabrication tolerance integrated optical mode multiplexer

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Science China(Information Sciences) 2020年第6期63卷 184-194页

作者： Bitao SHEN Haowen SHU Linjie ZHOU Xingjun WANG state key laboratory on advanced optical communication systems and networks Department of ElectronicsSchool of Electronics Engineering and Computer Science Peking University state key laboratory of advanced optical communication systems and networks Department of Electronic Engineering Shanghai Jiao Tong University Nano-optoelectronics Frontier Center of Ministry of Education Peking University

The tapered asymmetric directional coupler has the potential to realize high fabrication tolerance and high transmission efficiency on-chip mode multiplexer. However, the geometry parameter selection of tapered structure remains empirical. In this paper, we propose a design method for the tapered structure based on genetic algorithm. Combined with the adjusted coupling equations and interpolation method, lowtime-cost optimization can be realized. Three mode multiplexers(TE0&TE1, TE0&TE2 and TE0&TE5)are designed by our method. According to simulation results, the insertion loss of the designed devices is lower than 1.8 dB and the crosstalk is lower than-15 dB when the fabrication error is within required range(±10 nm for TE0&TE2 and TE0&TE5, and ±20 nm for TE0&TE1) in the bandwidth of 1.5–1.6 μm. In addition, the entire optimization process takes only 2 h for each device, which is around the time cost of a single 3 D simulation.

关键词： mode multiplexer directional coupler taper structure coupled-mode theory genetic algorithm

Reversible optical Isolators and Quasi-Circulators Using a Magneto-optical Fabry-Pérot Cavity

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Chinese Physics Letters 2024年第4期41卷 59-68页

作者：张天天周文鹏李志向唐宇涛许帆吴浩东张涵唐江山阮亚平夏可宇 College of Engineering and Applied Sciences National Laboratory of Solid State Microstructuresand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Shenzhen Shaanxi Coal Hi-tech Research Institute Co. LtdShenzhen 518083China School of Physics Nanjing UniversityNanjing 210023China Jiangsu key laboratory of Artificial Functional Materials Nanjing UniversityNanjing 210023China

Nonreciprocal optical devices are essential for laser protection,modern optical communication and quantum information processing by enforcing one-way light *** conventional Faraday magneto-optical nonreciprocal devices rely on a strong magnetic field,which is provided by a permanent *** a result,the isolation direction of such devices is fixed and severely restricts their applications in quantum *** this work,we experimentally demonstrate the simultaneous one-way transmission and unidirectional reflection by using a magneto-optical Fabry-Pérot cavity and a magnetic field strength of 50 *** optical isolator and a three-port quasi-circulator are realized based on this nonreciprocal cavity *** isolator achieves an isolation ratio of up to 22 dB and an averaged insertion loss down to 0.97 *** quasi-circulator is realized with a fidelity exceeding 99% and an overall survival probability of 89.9%,corresponding to an insertion loss of~0.46 *** magnetic field is provided by an electromagnetic coil,thereby allowing for reversing the light circulating *** reversible quasi-circulator paves the way for building reconfigurable quantum networks.

关键词： quantum reciprocal insertion

Optofluidic microring dye laser embedded in polydimenthylsiloxane with reduced threshold

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Science China Technological Sciences 2013年第3期56卷 594-597页

作者： SHEN ZhenHua ZOU Yun CHEN XianFeng Department of Physics State Key Laboratory of Advanced Optical Communication Systems and NetworksShanghai Jiao Tong University

We demonstrate an integrated optofluidic microring dye laser with a relatively low threshold on a polydimenthylsiloxane(PDMS) *** chip was fabricated through conventional soft *** consists of a liquid waveguide with microring structure providing the feedback.A reduced threshold is realized due to the unique design of the bus waveguide across the center of the microring structure,which results in a great reduction in the cavity *** dye rhodamine 6G(R6G) dissolved in benzyl alcohol was injected into the microfluidic channel as the gain *** the dye laser was pumped with a pulsed laser at 532 nm,the dye laser oscillation was achieved with a threshold of only 4?5 μJ *** convenience in fabrication and operation makes the optofluidic microring dye laser a promising underlying photonic component in the integrated optofluidic systems.

关键词： optofluidics optofluidic microring dye laser integrated optofluidic systems

Design and parametric amplification analysis of dispersion-flat photonic crystal fibers

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Chinese Optics Letters 2005年第7期3卷 380-382页

作者：汪井源高明义姜淳胡卫生 state key laboratory of advanced optical communication systems and networks Shanghai Jiao Tong University Shanghai 200030

We present a modified method to design photonic crystal fibers (PCFs) with flattened dispersion char- acteristic. Using this modified PCF we design a broadband fiber optical parametric amplifier (FOPA), which provides a gain of 8 dB with 1.5-dB uniformity over a 260-nm bandwidth. Both the simulation results of total dispersion of PCF and the gain spectrum of FOPA are demonstrated.

关键词： Electromagnetic dispersion Fiber lasers optical communication optical communication equipment

Polarization effect in parametric amplifier

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Chinese Optics Letters 2005年第9期3卷 500-502页

作者：周俊鹤陈建平李新碗吴龟灵王义平 state key laboratory of advanced optical communication systems and networks Shanghai Jiao Tong University Shanghai 200030

Polarization effect in parametric amplifiers is studied. Coupled equations are derived from the basic propagation equations and numerical solutions are given for both one-wavelength-pump and two-wavelengthpump systems. Several parametric amplifiers driven by pumps at one wavelength and two wavelengths are analyzed and the polarization independent parametric amplifier is proposed.

关键词： Nonlinear equations Numerical methods optical communication Polarization Pumps

Tunable and low bending loss of liquid-core fiber

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Chinese Optics Letters 2010年第1期8卷 14-17页

作者：戴芬芬许永豪陈险峰 Department of Physics the State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication SystemsShanghai Jiao Tong University

The liquid-core fiber with relatively high refractive index difference between the core and cladding is proven to be bending insensitive. The single mode condition and bending loss of the fiber with a mixture of toluene and chloroform as its core material are studied. The results show that the bending loss of this fiber is not only much smaller than the conventional silica single mode fiber but also can be tuned by the temperature and liquid mixture ratio. This kind of fiber may find its potential applications in all-optical network.

关键词： Coremaking Fiber optic networks Liquids Refractive index Silica Single mode fibers Toluene

Formation of domain reversal by direct irradiation with femtosecond laser in lithium niobate

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Chinese Optics Letters 2009年第2期7卷 169-172页

作者：朱海生陈险峰陈洪云邓学伟 Department of Physics the State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems Shanghai Jiao Tong University

We propose that domain inversion can be directly induced by femtosecond laser both theoretically and experimentally, which opens a path to achieve three-dimensional （3D） nonlinear crystal with a period in sub-micron-scale. A simulation of domain inversion is modeled by considering the temporal distribution of femtosecond pulses. The calculation results clarify that the domain inversions can happen within or after the interaction with the laser pulse, and the response time of domain inversion is in the picosecond level depending on the intensity and the materials. The domain reversal windows of lithium niobate by femtosecond laser are observed which agrees with theoretical predictions qualitatively.

关键词： Electromagnetic pulse Laser windows Lasers Lithium Niobium compounds Three dimensional Ultrashort pulses

Proposal for simultaneous all-optical AND,NOR,and XNOR logic gates using QPM cascading nonlinear effects in two PPLNs

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Chinese Optics Letters 2013年第6期11卷 66-69页

作者：唐喻斌陈玉萍蒋淏苇吉唯峰吴依菁陈险峰 state key laboratory on Fiber Optic Local Area communication networks and advanced optical communication systems Department of PhysicsShanghai Jiao Tong University

We propose AND, NOR, and XNOR logic gates realized simultaneously for 40-Gb/s networks, in which the realization of NOR and XNOR logic gates using only MgO-doped periodically poled lithium niobate （MgO： PPLN） is reported. In our configuration, we exploit broadband quasi-phase matching （QPM） cascaded sec- ond harmonic and difference-frequency generation （cSHG/DFG）, cascaded sum-frequency and difference- frequency generation （cSFG/DFG） in one MgO：PPLN, and the narrow band QPM sum-frequency genera- tion （SFG） in another MgO：PPLN. The performance, including the quality-factor （Q-factor） and extinction ratio （ER）, of the proposed multifunctional logic device is also simulated.

关键词： Interferometry Magnesia

Blind zone-suppressed hybrid beam steering for solid-state Lidar

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Photonics Research 2021年第9期9卷 1871-1880页

作者： CHAO LI XIANYI CAO KAN WU GAOFENG QIU MINGLU CAI GUANGJIN ZHANG XINWAN LI JIANPING CHEN state key laboratory of advanced optical communication systems and networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China

We demonstrate a blind zone-suppressed and flash-emitting solid-state Lidar based on lens-assisted beam-steering *** a proof-of-concept demonstration,with the design of a subwavelength-gap 1D long-emitter array and multiwavelength flash beam emitting,the device was measured to have 5%blind zone suppression,0.06°/point-deflection step,and 4.2μs scanning *** time-of-flight ranging experiments,Lidar systems have a field of view of 11.3°×8.1°(normal device)or 0.9°×8.1°(blind-zone suppressed device),far-field number of resolved points of 192,and a detection distance of 10 *** work demonstrates the possibility that a new integrated beam-steering technology can be implemented in a Lidar without sacrificing other performance.

关键词： Blind beam Lidar