检索结果-南通市图书馆

Hybrid-integrated 200 Gb/s REC-DML array transmitter based on photonic wire bonding technology

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Optics Letters 2024年第8期22卷 64-69页

作者： Yuxin Ma Jie Zhao Tongtong Yang Yipeng Mei Zhenxing Sun Jun Lu Shaobo Li Xiang Ma Xiangfei Chen Key Laboratory of Intelligent optical Sensing and Manipulation of the Ministry of Education&National Laboratory of Solid State Microstructures&College of Engineering and Applied Sciences&Institute of optical Communication Engineering&Nanjing University-Tongding Joint Lab for Large-Scale Photonic Integrated Circuits Nanjing UniversityNanjing 210023China optical Communication Research and Development Center 54th Research Institute of China Electronics Technology Group CorporationShijiazhuang 050081China

An 8-channel hybrid-integrated chip for 200 Gb/s(8×25 Gb/s)signal transmission has been *** channels are all within the O-band,and with a spacing of 800 *** core of this chip is a monolithic integrated multi-wavelength laser array of 8 directly-modulated distributed feedback(DFB)*** using the reconstruction equivalent chirp technique,multi-wavelength integration and asymmetric phase shift structures are achieved in the laser *** output laser beams of the array are combined by a planar light-wave circuit,which is hybrid-integrated with the laser array by photonic wire *** results of this transmitter chip show good single-mode working of each unit laser,with a sidemode suppression ratio above 50 dB,and the modulation bandwidth is above 20 *** eye diagrams are obtained in the lasers for 25 Gb/s non-return-to-zero modulation,which implies a total 200 Gb/s transmission rate for the whole chip.

关键词： direct modulation laser array reconstruction equivalent chirp photonic wire bonding hybrid integration

Research on visual sensitivity characteristics of amorphous silicon photocells

在线全文

学校读者我要写书评

暂无评论

Optoelectronics Letters 2024年第7期20卷 385-392页

作者： WANG Yan CAI Nuo ZHOU Xiaodi LU Yabin WANG Chunyan FAN Xinmin Department of Physics and Electronic Information Weifang UniversityWeifang 261061China Shandong North optical Electronics Co. Ltd.China North Industries GroupTaian 271000China College of Electronic Information and optical Engineering Nankai UniversityTianjin 300350China

This study delves into the feasibility of using amorphous silicon photocells as photosensitive units for retinal ***,theoretical simulations coupled with experimental results demonstrated its strong light absorption and quantum efficiency within the 300—800 nm ***,measurements on its visual sensitivity properties were *** findings revealed that under photopic vision conditions,the photocells could provide the stimulating current required for the human retinal nerve ***,the visual spectral sensitivity curve of the amorphous silicon photocells was assessed,and the results indicated that the spectral sensitivity curve of the amorphous silicon photocells closely mirrors the visual function curve of the human eye under photopic conditions,demonstrating a response to light across various wavelengths.

关键词： amorphous visual range

Improving the underwater navigation performance of an IMU with acoustic long baseline calibration

在线全文

学校读者我要写书评

暂无评论

Satellite Navigation 2024年第1期5卷 224-239页

作者： Paipai Wu Wenfeng Nie Yangfan Liu Tianhe Xu Shandong Key Laboratory of optical Astronomy and Solar-Terrestrial Environment Institute of Space SciencesShandong UniversityWeihai264209ShandongChina Research group of Astronomy and Geomatics(gAGE) Universitat Politecnica de Catalunya(UPC)BarcelonaSpain

Underwater acoustic Long-Baseline System(LBL)is an important technique for submarine positioning and ***,the high cost of the seafloor equipment and complex construction of a seafloor network restrict the distribution of the LBL within a small area,making an underwater vehicle difficult for long-distance and high-precision acoustic-based or inertial-based *** therefore propose an acoustic LBL-based Inertial Measurement Unit(IMU)calibration *** the underwater vehicle can receive the acoustic signal from a seafloor beacon,the IMU is precisely calibrated to reduce the cumulative error of Strapdown Inertial Navigation System(SINS).In this way,the IMU is expected to maintain a certain degree of accuracy by relying solely on SINS when the vehicle reaches out the range of the LBL network and cannot receive the acoustic *** present the acoustic LBL-based IMU online calibration model and analyze the factors that affect the accuracy of IMU *** results fulfill the expectation that the gyroscope bias and accelerometer bias are the main error sources that affect the divergence of SINS position errors,and the track line of the underwater vehicle directly affects the accuracy of the calibration *** addition,we deduce that an optimal calibration trajectory needs to consider the effects of the three-dimensional observability and position dilution of *** the experiment,we compare the effects of seven calibration trajectories:straight and diamond-shaped with and without the change of depth,and three sets of curves with the change of depth:circular,S-shaped,and *** them,we find that the figure-eight is the optimal trajectory for acoustic LBL-based IMU online *** take the maintenance period during which the accumulated SINS Three Dimensional(3D)position errors are below 1 km to evaluate the calibration *** filed experimental results show that for the Micro-electromechanical System

关键词： Acoustic LBL Online IMU calibration SINS Relay reference network

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

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

Switching,explosion,and chaos of multi-wavelength soliton states in ultrafast fiber lasers

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2024年第7期67卷 82-90页

作者： Zhi-Zeng Si Yue-Yue Wang Chao-Qing Dai College of optical Mechanical and Electrical EngineeringZhejiang A&F UniversityLin’an 311300China

Because of the complexity and difficulty of realizing a multi-wavelength soliton state,reports on its internal dynamic characteristics are *** this study,the switching and periodic soliton explosion processes of the multi-wavelength soliton state in a negative dispersion passively mode-locked fiber laser are *** generation of the multi-wavelength soliton state undergoes the process of noise,oscillation,and stable mode-locking,and the splitting and annihilation of solitons with different group velocities directly impact the generation and disappearance of three *** and negative dispersion lead to different group velocities of *** presence and displacement of solitons with different group velocities cause soliton collisions,which lead to soliton explosions.A soliton experiences relative phase oscillation,chaos,and oscillation,as well as convergence and separation before and after an *** an increase in parameters related to pump power,single-soliton oscillation,multi-wavelength solitons,and chaos are found in experiments and simulations,proving the relevance and reliability between simulation and experimental *** work promotes the dynamical study of multi-soliton collisions in nonlinear science and the development of chaos theory in multi-comb lasers.

关键词： multi-wavelength fiber laser soliton explosion chaos state switching real-time dynamics

Stability-enhanced RF signal transmission over long fiber-optic links

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2024年第5期22卷 131-136页

作者：尹知谦郑满航张川博管世健周昕刘奕彤刚泽宇聂佳强张云山朱兴邦方涛陈向飞 Engineering Research Center of Precision Photonics Integration and System Application Ministry of Education&Key Laboratory of Intelligent Optical Sensing and ManipulationMinistry of Education&National Laboratory of Solid State Microstructures&College of Engineering and Applied Sciences&Institute of Optical Communication Engineering&Nanjing University-Tongding Joint Lab for Large-scale Photonic Integrated CircuitsNanjing UniversityNanjing 210023China College of Electronics and optical Engineering and College of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China The 41st Research Institute of China Electronics Technology group Corp Qingdao 266000China

We propose a method for optimizing the phase stability of microwave signal transmission over long ***,the design of the photon link was modified to reduce the radio frequency(RF)signal’s baseline noise and increase ***,a low-noise driver circuit was developed for a two-section distributed feedback(DFB)laser designed using reconstruction equivalent chirp(REC)technology to create an ultra-stable laser,and its performance was characterized through linewidth *** results indicate that the DFB laser achieved narrower linewidth,improving system phase *** an injection current(30 mA)is applied to the reflection section of the two-section DFB laser,the laser linewidth will be narrower(1.38 MHz),further enhancing the system’s phase transmission *** a 1 Hz offset frequency,a residual phase noise of-88.65 dBc/Hz is *** short-term stability with an averaging time of 1 s is 1.60×10^(-14),and the long-term stability over a testing time of 60,000 s is 3.41×10^(-18).Even after incorporating temperature variations,the long-term stability reaches 8.37×10^(-18) at 22 h.

关键词： frequency dissemination two-section distributed feedback laser phase stability

Time-of-flight resolved stimulated Raman scattering microscopy using counter-propagating ultraslow Bessel light bullets generation

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第7期13卷 1427-1440页

作者： Shulang Lin Li Gong Zhiwei Huang optical Bioimaging Laboratory Department of Biomedical EngineeringCollege of Design and EngineeringNational University of SingaporeSingapore 117576Singapore

We present a novel time-of-flight resolved Bessel light bullet-enabled stimulated Raman scattering(B2-SRS)microscopy for deeper tissue 3D chemical imaging with high resolution without a need for mechanical *** accomplish the tasks,we conceive a unique method to enable optical sectioning by generating the counterpropagating pump and Stokes Bessel light bullets in the sample,in which the group velocities of the Bessel light bullets are made ultraslow(e.g.,vg≈0.1c)and tunable by introducing programmable angular dispersions with a spatial light *** theoretically analyze the working principle of the collinear multicolor Bessel light bullet generations and velocity controls with the relative time-of-flight resolved detection for SRS 3D deep tissue *** have also built the B2-SRS imaging system and present the first demonstration of B2-SRS microscopy with Bessel light bullets for 3D chemical imaging in a variety of samples(e.g.,polymer bead phantoms,biological samples such as spring onion tissue and porcine brain)with high *** B2-SRS technique provides a>2-fold improvement in imaging depth in porcine brain tissue compared to conventional SRS *** method of optical sectioning in tissue using counter-propagating ultraslow Bessel light bullets developed in B2-SRS is generic and easy to perform and can be readily extended to other nonlinear optical imaging modalities to advance 3D microscopic imaging in biological and biomedical systems and beyond.

关键词： Bessel resolved propagating

Fabrication of a 3D bioprinting model for posterior capsule opacification using GelMA and PLMA hydrogel-coated resin

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Regenerative Biomaterials 2024年第4期3卷 52-65页

作者： Xin Liu Jiale Li Shuyu Liu Yan Long Ching Kang Chen Zhao Ling Wei Shaoqi Huang Yi Luo Bo Dai Xiangjia Zhu Cataract and Lens Refractive Surgery group Department of OphthalmologyEye&ENT Hospital of Fudan UniversityShanghai 200031People’s Republic of China NHC Key Laboratory of Myopia Key Laboratory of MyopiaChinese Academy of Medical SciencesFudan UniversityShanghai 200031People’s Republic of China Shanghai Key Laboratory of Visual Impairment and Restoration Shanghai 200031People’s Republic of China Engineering Research Center of optical Instrument and System the Ministry of EducationShanghai Key Laboratory of Modern Optical SystemUniversity of Shanghai for Science and TechnologyShanghai 200093China

Posterior capsule opacification(PCO)remains the predominant complication following cataract surgery,significantly impairing visual function *** this study,we developed a PCO model that closely mimics the anatomical structure of the crystalline lens capsule *** model incorporated a threaded structure for accurate positioning and observation,allowing for opening and *** 3D printing technology,a stable external support system was created using resin material consisting of a rigid,hollow base and *** replicate the lens capsule structure,a thin hydrogel coating was applied to the resin *** biocompatibility and impact on cellular functionality of various hydrogel compositions were assessed through an array of staining techniques,including calcein-AM/PI staining,rhodamine staining,BODIPY-C11 staining and EdU staining in conjunction with transwell ***,the PCO model was utilized to investigate the effects of eight drugs with anti-inflammatory and anti-proliferative properties,including 5-aminoimidazole-4-carboxamide ribonucleotide(AICAR),THZ1,sorbinil,4-octyl itaconate(4-OI),xanthohumol,zebularine,rapamycin and caffeic acid phenethyl ester,on human lens epithelial cells(HLECs).Confocal microscopy facilitated comprehensive imaging of the PCO *** results demonstrated that the GelMA 605%þPLMA 2%composite hydrogel exhibited superior biocompatibility and minimal lipid peroxidation levels among the tested ***,compared to using hydrogel as the material for 3D printing the entire model,applying surface hydrogel spin coating with parameters of 2000 rpm�2 on the resin-based 3D printed base yielded a more uniform cell distribution and reduced ***,rapamycin,4-OI and AICAR demonstrated potent antiproliferative effects in the drug intervention *** microscopy imaging revealed a uniform distribution of HLECs along the anatomical structure of the crystalline lens capsule with

关键词： posterior capsule opacification(PCO) human lens epithelial cells(HLECs) 3D bioprinting hydrogel resin

Ultra-high-Q free-space coupling to microtoroid resonators

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第4期13卷 682-695页

作者： Sartanee Suebka Euan McLeod Judith Su Wyant College of optical Sciences University of ArizonaTucsonAZUSA Department of Biomedical Engineering University of ArizonaTucsonAZUSA

Whispering gallery mode(WGM)microtoroid resonators are one of the most sensitive biochemical sensors in existence,capable of detecting single *** main barrier for translating these devices out of the laboratory is that light is evanescently coupled into these devices though a tapered optical *** hinders translation of these devices as the taper is fragile,suffers from mechanical vibration,and requires precise ***,we eliminate the need for an optical fiber by coupling light into and out from a toroid via free-space coupling and monitoring the scattered resonant light.A single long working distance objective lens combined with a digital micromirror device(DMD)was used for light injection,scattered light collection,and *** obtain Q-factors as high as 1:6´108 with this *** induced transparency(EIT)-like and Fano resonances were observed in a single cavity due to indirect coupling in free *** enables improved sensing *** large effective coupling area(~10μm in diameter for numerical aperture=0.14)removes the need for precise *** performance was verified by combining the system with the frequency locked whispering evanescent resonator(FLOWER)approach to perform temperature sensing experiments.A thermal nonlinear optical effect was examined by tracking the resonance through FLOWER while adjusting the input *** believe that this work will be a foundation for expanding the implementation of WGM microtoroid resonators to real-world applications.

关键词： coupling scattered precise