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Raman lasing and other nonlinear effects based on ultrahigh-Q CaF_(2)optical resonator

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Chinese Physics B 2022年第10期31卷 423-428页

作者： Tong xing enbo xing Tao Jia Jianglong Li Jiamin Rong Yanru Zhou Wenyao Liu Jun Tang Jun Liu Key Laboratory of Electronic Testing Technology School of Instrument and ElectronicsNorth University of ChinaTaiyuan 030051China

The calcium fluoride(CaF_(2))whispering gallery mode crystalline resonator is an excellent platform for nonlinear optical applications because of the decreasing in threshold caused by ultrahigh quality(Q)*** this paper,we achieved the observation of Raman lasing,first-order Raman comb,and second-order Raman lasing in a CaF_(2)disk resonator with a diameter of 4.96 mm and an ultrahigh-Q of 8.43×10^(8)at 1550-nm *** also observed thermal effects in CaF_(2)disk resonator,and the threshold of thermo-optical oscillation is approximately coincident with Raman lasing,since the intracavity power increases rapidly when the power reaches the threshold,and higher input pump power results in longer thermal drift and higher Raman emission *** a further increase in pump power,the optical frequency combs range is from 1520 nm to 1650 nm,with a wavelength interval of 4×*** is a promising candidate for optical communication,biological environment monitoring,spectral analysis,and microwave signal sources.

关键词： whispering gallery mode crystalline resonator Raman lasing nonlinear effects thermo-optical oscillation optical frequency combs

A novel dual-channel thermo-optic locking method for the whispering gallery mode microresonator

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Chinese Physics B 2024年第5期33卷 438-444页

作者：范文杰刘文耀潘梓文王蓉刘来邢恩博周彦汝唐军刘俊 State Key Laboratory of Dynamic Measurement Technology North University of ChinaTaiyuan 030051China Shanxi Province Key Laboratory of Quantum Sensing and Precision Measurement North University of ChinaTaiyuan 030051China

Mode locking can be effectively achieved by using the thermo-optic effects in the whispering gallery mode(WGM)optical microcavity,without the help of external ***,it has the advantages of small size,low integration costs,and self-locking,which shows great potential for ***,the conventional single-channel microcavity thermal-locking method that relies solely on internal thermal balance will inevitably be disturbed by the external *** limitation affects the locking time and ***,in this paper,we propose a new method for closed-loop thermal locking of a dual-channel *** thermal locking of the signal laser and the thermal regulation of the control laser are carried out respectively by synchronously drawing a dual-path tapered *** theoretical model of the thermal dynamics of the dual-channel microcavity system is established,and the influence of the control-laser power on the thermal locking of the signal laser is *** deviation between the locking voltage of the signal laser and the set point value is used as a closed-loop feedback parameter to achieve long-term and highly stable mode locking of the signal *** results show that in the 2.63 h thermal-locking test,the locking stability is an order of magnitude higher than that of the single tapered *** solution addresses the issue of thermal locking being disrupted by the external environment,and offers new possibilities for important applications such as spectroscopy and micro-optical sensor devices.

关键词： optical microcavity thermo-optic locking thermal nonlinearity effect

Design of a high sensitivity and wide range angular rate sensor based on exceptional surface

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Chinese Physics B 2024年第8期33卷 277-286页

作者：丁鑫圣刘文耀王师贤陶煜周彦汝白禹刘来邢恩博唐军刘俊 State Key Laboratory of Dynamic Measurement Technology North University of ChinaTaiyuan 030051China Shanxi Province Key Laboratory of Quantum Sensing and Precision Measurement North University of ChinaTaiyuan 030051China

It is found that when the parity–time symmetry phenomenon is introduced into the resonant optical gyro system and it works near the exceptional point,the sensitivity can in theory be significantly amplified at low angular ***,in fact,the exceptional point is easily disturbed by external environmental variables,which means that it depends on harsh experimental environment and strong control ability,so it is difficult to move towards practical ***,we propose a new angular rate sensor structure based on exceptional surface,which has the advantages of high sensitivity and high *** system consists of two fiber-optic ring resonators and two optical loop mirrors,and one of the resonators contains a variable ratio coupler and a variable optical *** theoretically analyze the system response,and the effects of phase and coupling ratio on the system ***,compared with the conventional resonant gyro,the sensitivity of this exceptional surface angular rate sensor can be improved by about 300 times at low *** addition,by changing the loss coefficient in the ring resonator,we can achieve a wide range of 600 rad/*** scheme provides a new approach for the development of ultra-high sensitivity and wide range angular rate sensors in the future.

关键词： exceptional surface exceptional points ring resonator angular rate sensing rotational direction recognition wide operating range

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基于氟化钙光学谐振腔的声传感机理研究

传感器与微系统 2022年第7期41卷 9-12,28页

作者：邢恩博邢彤戎佳敏唐军中北大学仪器与电子学院山西太原030051

氟化钙回音壁模式谐振腔的光学品质因子实验上已经突破10^(11),同时能够实现高稳定棱镜耦合集成,因此,在非接触式的超高灵敏度声学传感方面具有重要的应用潜力。然而,对于高杨氏模量氟化钙晶体材料,外界声学扰动的机理尚不明确。基于氟... 详细信息

氟化钙回音壁模式谐振腔的光学品质因子实验上已经突破10^(11),同时能够实现高稳定棱镜耦合集成,因此,在非接触式的超高灵敏度声学传感方面具有重要的应用潜力。然而,对于高杨氏模量氟化钙晶体材料,外界声学扰动的机理尚不明确。基于氟化钙晶体盘型谐振腔结构,对外界声学扰动的影响机理进行研究。当外界声压作用于谐振腔时,从空气密度引起的折射率变化、弹光效应诱导有效折射率改变和谐振腔结构形变三个方面开展了研究。计算结果表明:声压导致的谐振腔结构形变影响最为明显,以实验室器件为参考,达到了1.196×10^(-10)Pa^(-1),对应的谐振峰波长响应为4.63×10^(-7)nm/Pa。谐振腔厚度及支撑结构的优化能够提升一个数量级以上,灵敏度可以较容易突破1 V/Pa。

关键词：回音壁模式谐振腔氟化钙晶体高灵敏度声传感机理弹光效应结构形变

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盐度层化对水体紊动特性影响的实验研究

水力发电学报 2020年第3期39卷 45-55页

作者：黄睿张庆河邢恩博张金凤天津大学水利工程仿真与安全国家重点实验室天津300072

采用双层横向振荡格栅生成的紊流分别研究了纯淡水和不同盐度梯度层化水体的紊动特性。通过声学多普勒流速仪和设计开发的多通道微型盐度测量仪同步测量了水体紊动和盐度的历时变化过程,分别从水体紊动的均方根流速、紊动强度和紊动能... 详细信息

采用双层横向振荡格栅生成的紊流分别研究了纯淡水和不同盐度梯度层化水体的紊动特性。通过声学多普勒流速仪和设计开发的多通道微型盐度测量仪同步测量了水体紊动和盐度的历时变化过程,分别从水体紊动的均方根流速、紊动强度和紊动能谱等紊动特性的变化分析了盐度层化对水体紊动的影响。实验结果表明盐度层化会抑制水体紊动,减弱水体紊动强度,并且盐度梯度越大水体紊动抑制程度越大。定义了表征振荡格栅紊流中水体层化程度的无量纲层化参数,水体紊动抑制率随层化参数的增大而增大,拟合得到层化参数和紊动抑制率的关系式。

关键词：盐度层化紊动特性振荡格栅微型盐度传感器

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基于区块链技术的产品标准链架构研究

科技管理研究 2022年第17期42卷 181-187页

作者：江涛邢恩博覃琼霞添梦中国计量大学经济与管理学院浙江杭州310018 浙江理工大学经济管理学院浙江杭州310018

针对产业链转型升级过程中存在的标准信息不匹配、传递效率低下和监管不到位等问题,构建基于区块链技术的产品标准链,设计以标准链为主链、企业链为侧链的主侧链双链系统。该系统采用信誉积分的委托权益证明(DPOS)共识机制,并引入中心... 详细信息

针对产业链转型升级过程中存在的标准信息不匹配、传递效率低下和监管不到位等问题,构建基于区块链技术的产品标准链,设计以标准链为主链、企业链为侧链的主侧链双链系统。该系统采用信誉积分的委托权益证明(DPOS)共识机制,并引入中心化监管机制的逻辑架构。基于区块链技术的标准链体系可以弱化产品标准的信息不对称程度,实现企业间标准信息的高效传递、匹配和共享,为科技赋能产业升级提供理论与实践参考。

关键词：区块链产品标准链委托权益证明技术架构

紧凑型宽带低损耗3 dB功率分配器设计与制备

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光学学报 2023年第22期43卷 230-237页

作者：周彦汝尹程玉刘文耀邢恩博唐军刘俊中北大学信息与通信工程学院山西太原030051 中北大学半导体与物理学院山西太原030051 中北大学仪器与电子学院山西太原030051

光功率分配器作为光子集成电路中分束并束的关键器件,要求结构紧凑、宽带、低损耗。基于亚波长光栅(SWG)结构,提出一种分束区域长5μm、分光比为50∶50的超大带宽低损耗3 dB光功率分配器。仿真结果表明,该光功率分配器在±15 nm的大工... 详细信息

光功率分配器作为光子集成电路中分束并束的关键器件,要求结构紧凑、宽带、低损耗。基于亚波长光栅(SWG)结构,提出一种分束区域长5μm、分光比为50∶50的超大带宽低损耗3 dB光功率分配器。仿真结果表明,该光功率分配器在±15 nm的大工艺容差下,TE模式在1.26~2.02μm波段内(即760 nm带宽)损耗低于0.54 dB。通过电子束曝光、干法刻蚀等工艺在绝缘体上硅(SOI)晶圆上加工制备该光功率分配器,在扫描电子显微镜(SEM)下观察SWG结构的加工误差不超过±10 nm。此外,搭建垂直耦合测试平台,利用可调谐激光器在1496.8~1600 nm波段,对TE模式的损耗与分光比进行测试。结果表明,该波段损耗约为0.3 dB,与仿真结果吻合,分光比误差在5%以内。该功率分配器适用于高速、大容量通信、波分复用(WDM)系统等互联应用场合。

关键词：紧凑宽带低损耗光功率分配器

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紧凑型光纤腔磁传感器研究与设计

国外电子测量技术 2023年第5期42卷 113-118页

作者：戎佳敏邢国徽邢恩博王德勇中北大学半导体与物理学院太原030051 中北大学仪器与电子学院太原030051

利用光学精密检测手段,结合高灵敏紧凑型光纤腔磁敏感单元,从理论和实验两方面研究了微弱磁信号敏感的传感系统。开发了紧凑型光纤腔磁敏感单元的制备工艺,长度为3 m的单模光纤紧凑绕制在直径为3 cm的超磁致伸缩材料Terfenol-D(Tb0.3Dy0... 详细信息

利用光学精密检测手段,结合高灵敏紧凑型光纤腔磁敏感单元,从理论和实验两方面研究了微弱磁信号敏感的传感系统。开发了紧凑型光纤腔磁敏感单元的制备工艺,长度为3 m的单模光纤紧凑绕制在直径为3 cm的超磁致伸缩材料Terfenol-D(Tb0.3Dy0.7Fe1.95)结构上。利用质量因子为1.9×10^(7)提升检测灵敏度,多圈绕制有利于外部磁扰动导致的光纤腔形变放大,而外部磁扰动导致Terfenol-D径向方向的伸缩,进而引起光纤腔长和共振频率的改变。实验结果表明,在158 mT的静磁增强下,直流磁场传感灵敏度为6.9 MHz/mT,交流磁场传感灵敏度为27.74 kHz/μT,系统本征噪声为623.298 nT/Hz1/2@100 kHz。所提出的磁传感方案,及制备的传感系统在微弱信号的测试领域具有广阔的应用前景。

关键词：光学谐振腔磁力计光纤传感

Dynamic range expansion for optical frequency shift detection based on multiple harmonics

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Chinese Optics Letters 2024年第4期22卷 42-47页

作者：周彦汝樊李凡徐凯刘文耀邢恩博唐军刘俊 State Key Laboratory of Dynamic Measurement Technology North University of ChinaTaiyuan 030051China School of Information&Communication Engineering North University of ChinaTaiyuan 030051China School of Instrument&Electronics North University of ChinaTaiyuan 030051China

Sensors based on optical resonators often have their measurement range limited by their cavity linewidth,particularly in the measurement of time-varying *** paper introduces a method for optical frequency shift detection using multiple harmonics to expand the dynamic range of sensors based on optical *** proposed method expands the measurement range of optical frequency shift beyond the cavity linewidth while maintaining measurement *** theoretical derivation of this method is carried out based on the equation of motion for an optical resonator and the recursive relationship of the Bessel *** results show that the dynamic range is expanded to 4 times greater than the conventional first harmonic method while still maintaining ***,we present an objective analysis of the correlation between the expansion factor of the method and the linewidth and free spectrum of the optical resonator.

关键词： optical resonator optical frequency shift multiple harmonics dynamic range expansion