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All-fibre micro-ring resonator based on tapered microfibre

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Chinese Physics B 2008年第3期17卷 1029-1033页

作者：董小伟鲁韶华冯素春许鸥简水生 State Key Laboratory of All Optical Network & Advanced Telecommunication Network Institute of Lightwave TechnologyBeijing Jiaotong University

In this paper, bendloss characteristics of an optical fibre are investigated in detail, and the results show that the resonator with a smaller ring radius, wider free spectrum range （FSR）, higher fineness （f） and quality-factor （Q） can be achieved by using microfibres. Based on the improved fused taper technique, a high-quality microfibre with 5 ttm radius has been fabricated, and an all-fibre micro-ring resonator with a radius of only 500μm is realized using self-coiling coupling method. The good-resonant characteristic makes the all-fibre device be expected to avoid bendloss and connection loss associated with planar waveguide integration.

关键词： all-fibre device micro-ring resonator microfibre,fused taper

Switchable microwave photonic filter using a phase modulator and a silicon-on-insulator micro-ring resonator

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Chinese Optics Letters 2020年第5期18卷 68-72页

作者：李思敏丛榕何正前王天亮张方正潘时龙 Key Laboratory of Radar Imaging and micro wave Photonics Ministry of EducationNanjing University of Aeronautics and AstronauticsNanjing 210016China Shanghai Institute of Satellite Engineering Shanghai 201109China

A switchable microwave photonic filter(MPF) using a phase modulator(PM) and a silicon-on-insulator microring resonator(MRR) is proposed and demonstrated. By adjusting the polarization controller between the PM and the MRR, the filtering function of the MPF can be switched between a band-stop filter and a band-pass filter. In a proof-of-concept experiment, an MPF with a rejection ratio of 30 dB(or 15 dB) for the band-stop(or band-pass) response and a frequency tuning range from 9.6 to 20.5 GHz is achieved.

关键词： microwave photonics micro-ring resonator microwave photonic filter

Robust Optical Frequency Comb Generation Based on Optical Parametric Oscillation in a High-index micro-ring resonator

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Robust Optical Frequency Comb Generation Based on Optical Pa...

Kerr frequency comb with varying FSR spacing based on Si3N4 micro-resonator

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作者： Weiqiang Wang Sai T.Chu Brent E.Little Yishan Wang Yuanshan Liu Wenfu Zhang Wei Zhao State Key Laboratory of Transient Optics and Photonics Xi’an Institute of Optics and Precision Mechanics Chinese Academy of Sciences

In this paper,we present an optical frequency comb(OFC)which is generated by the optical parametric oscillation(OPO)in an integrated CMOS-compatible high resonance factor(Q~1.45×106)nonlinear micro-ri

关键词： micro-ring resonator Optical parametric oscillation Optical frequency comb

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Science China(Information Sciences) 2020年第11期63卷 269-275页

作者： Yuedi DING Yu GAO Cheng ZENG Shanlin ZHU Qingzhong HUANG Yi WANG Ying HUANG Jinsong XIA Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology

In this paper, we experimentally investigate a novel feedback loop scheme to generate optical frequency comb with varying free spectral range(FSR) spacing in a high-Q silicon nitride(SiN) micro-ring resonator. By selecting and amplifying different feedback sidebands, comb line spacing varying from 1-fold to 6-fold FSRs is successfully achieved. This approach could be beneficial to tune the comb repetition rate which is an important parameter for many applications, such as optical coherent communications, optical metrology and arbitrary waveform generation.

关键词： feedback loop free spectral range silicon nitride Kerr frequency combs micro-ring resonator

High‑resolution silicon photonic sensor based on a narrowband microwave photonic flter

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Frontiers of Optoelectronics 2023年第1期16卷 65-72页

作者： Haiyan Luo Lu Xu Jie Yan Qiansheng Wang Wenwu Wang Xi Xiao Institute of microelectronics Chinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China National Information Optoelectronics Innovation Center China Information and Communication Technologies Group CorporationWuhan 430074China

microwave photonic sensors are promising for improving sensing resolution and speed of optical sensors.In this paper,a high-sensitivity,high-resolution temperature sensor based on microwave photonic flter(MPF)is proposed and demonstrated.A micro-ring resonator(MRR)based on silicon-on-insulator is used as the sensing probe to convert the wavelength shift caused by temperature change to microwave frequency variation via the MPF system.By analyzing the frequency shift with high-speed and high-resolution monitors,the temperature change can be detected.The MRR is designed with multi-mode ridge waveguides to reduce propagation loss and achieves an ultra-high Q factor of 1.01×10^(6).The proposed MPF has a single passband with a narrow bandwidth of 192 MHz.With clear peak-frequency shift,the sensitivity of the MPF-based temperature sensor is measured to be 10.22 GHz/℃.Due to higher sensitivity and ultra-narrow bandwidth of the MPF,the sensing resolution of the proposed temperature sensor is as high as 0.019℃.

关键词： micro-ring resonator microwave photonic flter Silicon photonics microwave photonic sensor

Design and simulation of a silicon-based hybrid integrated optical gyroscope system

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Chinese Physics B 2023年第4期32卷 397-404页

作者：孙道鑫张东亮鹿利单徐涛郑显通周哲海祝连庆 Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument Beijing Information Science&Technology UniversityBeijing 100192China Beijing Laboratory of Optical Fiber Sensing and System Beijing Information Science&Technology UniversityBeijing 100016China

By combining a silicon-based lithium niobate modulator and a silicon-based Si3N4resonator with silicon-based photonics technology,a highly systematic design of a hybrid integrated optical gyroscope with enhanced reciprocity sensitivity and a dual micro-ring structure is proposed for the first time in this paper.The relationship between the device's structural parameters and optical performance is also analyzed by constructing a complete simulation link,which provides a theoretical design reference to improve the system's sensitivity.When the wavelength is 1550 nm,the conversion frequency of the dual-ring optical path is 50 MHz,the coupling coefficient is 0.2,and the radius R is 1000μm,the quality factor of the silicon-based Si_(3)N_(4)resonator is 2.58×10^(5),which is 1.58 times that of the silicon-on-insulator resonator.Moreover,the effective number of times the light travels around the ring before leaving the micro-ring is 5.93,which is 1.62 times that of the silicon-on-insulator resonator.The work fits the gyro dynamic output diagram,and solves the problem of low sensitivity at low speed by setting the phase offset.This results provide a basis for the further optimization of design and chip processing of the integrated optical gyroscope.

关键词： silicon photonics integrated optical gyroscope micro-ring resonator Sagnac effect

Frequency-doubled vortex beam emitter based on nonlinear Cherenkov radiation

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Chinese Optics Letters 2020年第7期18卷 82-86页

作者：林晨陈琰李晓阳杨磊倪睿赵刚张勇胡小鹏祝世宁 National Laboratory of Solid State microstructures College of Engineering and Applied Sciencesand School of PhysicsNanjing UniversityNanjing 210093China

In this work, we propose a new scheme to generate frequency-doubled vortex beams from a radially poled Li Nb O3 micro-ring resonator based on nonlinear Cherenkov radiation. The near-infrared fundamental wave is resonant in the micro-ring, while the second harmonic is emitted from the resonator along the Cherenkov phase-matching direction. The topological charge of the emitted second-harmonic vortex beam is determined by both the azimuthal order of the whispering galley modes and the number of nonlinear grating elements. The field distribution and the conversion efficiency of the emitted vortex beam are investigated.

关键词： vortex beam nonlinear Cherenkov radiation micro-ring resonator second harmonic generation lithium niobate

Integrated photonic convolution acceleration core for wearable devices

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Opto-Electronic Science 2023年第12期2卷 16-25页

作者： Baiheng Zhao Junwei Cheng Bo Wu Dingshan Gao Hailong Zhou Jianji Dong Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Optics Valley Laboratory Wuhan 430074China

With the advancement of deep learning and neural networks,the computational demands for applications in wearable devices have grown exponentially.However,wearable devices also have strict requirements for long battery life,low power consumption,and compact size.In this work,we propose a scalable optoelectronic computing system based on an integrated optical convolution acceleration core.This system enables high-precision computation at the speed of light,achieving 7-bit accuracy while maintaining extremely low power consumption.It also demonstrates peak throughput of 3.2 TOPS(tera operations per second)in parallel processing.We have successfully demonstrated image convolution and the typical application of an interactive first-person perspective gesture recognition application based on depth information.The system achieves a comparable recognition accuracy to traditional electronic computation in all blind tests.

关键词： optoelectronic compute wearable devices micro-ring resonator hand gesture recognition