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Polarization full feedback external cavity of open loop spectral beam combining based on multi-single emitters laser diode

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Chinese Optics Letters 2024年第5期22卷 80-84页

作者：胡满张伟桥曹澎李彤彤周旭彦郑婉华 Laboratory of Solid-State Optoelectronics Information Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Weifang Academy of Advanced Opto-Electronic Circuits Weifang 261071China State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China College of Future Technology University of Chinese Academy of SciencesBeijing 101408China

In this paper,a spectral beam combining(SBC)structure of multi-single emitters laser diode based on a polarization full feedback(PFF)external cavity is proposed and *** maximum combining efficiency is 75.6%,which leads to an output power of 38.48 W,a degree of polarization(DOP)of 99.42%,and electro-optical conversion efficiency of 35.63%under continuous wave operation at a current of 8 *** to the conventional SBC,the output power,the combining efficiency,the electro-optical conversion efficiency,and the DOP of the PFF-SBC structure present improvements of 5.73 W,11.26 percentage points,5.3 percentage points,and 7.26 percentage points,*** results show that this SBC method can achieve a high efficiency and linearly polarized laser output of SBC,thereby making the subsequent polarization beam-combining efficiency approach the limit.

关键词： diode laser spectral beam combining high efficiency degree of polarization external cavity feedback

小儿危重病护理评分的个体化护理联合肺泡灌洗在重症肺炎气管插管患儿中的应用

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包头医学院学报 2024年第3期40卷 84-87,96页

作者：周许艳焦鸿虹杨欣南阳市第二人民医院(PICU) 河南南阳473000

目的:分析基于小儿危重病护理评分的个体化护理联合肺泡灌洗在重症肺炎(severe pneumonia, SP)气管插管患儿中的效果。方法:选取2020年1月至2021年9月期间收治的SP气管插管患儿94例作为研究对象,均接受肺泡灌洗,依据随机数字表法分成研... 详细信息

目的:分析基于小儿危重病护理评分的个体化护理联合肺泡灌洗在重症肺炎(severe pneumonia, SP)气管插管患儿中的效果。方法:选取2020年1月至2021年9月期间收治的SP气管插管患儿94例作为研究对象,均接受肺泡灌洗,依据随机数字表法分成研究组与对照组,各47例。对照组接受常规护理干预,研究组接受基于小儿危重病护理评分的个体化护理。统计对比两组康复效果(机械通气时间、住院时间)、并发症发生率、家属护理满意度以及干预前后生活质量[简明健康状况量表(SF-36)]、血气指标[动脉血二氧化碳分压(PaCO_(2))、动脉血氧分压(PaO_(2))]。结果:研究组患者住院时间、机械通气时间短于对照组(P<0.05);研究组患者并发症发生率(2.13%)低于对照组(21.28%)(P<0.05);干预后研究组患者PaO_(2)高于对照组(P<0.05),PaCO_(2)低于对照组(P<0.05);干预后两组SF-36评分高于干预前,且研究组患者高于对照组(P<0.05);研究组患者家属护理满意度(97.87%)高于对照组(76.60%)(P<0.05)。结论:基于小儿危重病护理评分的个体化护理联合肺泡灌洗应用于SP气管插管患儿,可缩短机械通气时间与住院时间,改善血气指标,减少并发症发生,优化生活质量,增加家属护理满意度。

关键词：小儿危重病护理评分个体化护理重症肺炎气管插管患儿

胃肠肿瘤根治术患者麻醉恢复室转出延迟预测模型的建立

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护理学杂志 2024年第12期39卷 55-58,63页

作者：王荣姚明盛晗朱志红周清河周煦燕杨国芳嘉兴大学附属医院(嘉兴市第一医院)麻醉手术部浙江嘉兴314000

目的构建与验证胃肠肿瘤根治术患者麻醉恢复室转出延迟的风险预测模型,为识别转出延迟高风险患者提供评估工具。方法采用回顾性研究方法,选取2020年6月至2021年12月某三甲医院的手术患者511例,分为训练集361例和验证集150例。运用logis... 详细信息

目的构建与验证胃肠肿瘤根治术患者麻醉恢复室转出延迟的风险预测模型,为识别转出延迟高风险患者提供评估工具。方法采用回顾性研究方法,选取2020年6月至2021年12月某三甲医院的手术患者511例,分为训练集361例和验证集150例。运用logistic回归分析探索胃肠肿瘤根治术患者麻醉恢复室转出延迟的风险因素,绘制列线图模型,在验证集中验证模型预测效果。结果回归分析结果显示,麻醉ASAⅢ级、低体温、高血压、术中出血>200 mL、中重度贫血5项因素为胃肠肿瘤根治术患者麻醉恢复室转出延迟的主要危险因素。使用这5项因素构建转出延迟风险预测模型,训练集模型ROC曲线下面积为0.805[95%CI(0.752,0.857)],最大约登指数为0.484;验证集模型ROC曲线下面积为0.828[95%CI(0.753,0.914)],最大约登指数为0.569,校准曲线为斜率近似于1的直线。结论本研究构建的风险预测模型具有良好的预测效能,能为临床早期甄别胃肠肿瘤根治术患者麻醉恢复室转出延迟提供参考。

关键词：胃肠肿瘤全麻手术麻醉恢复室转出延迟风险预测列线图低体温高血压

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椭圆氧化孔径垂直腔面发射激光器的偏振特性

中国激光 2024年第6期51卷 57-66页

作者：谢中华渠红伟周旭彦张建心隋佳桐孟凡胜宫凯郑妹茵王海玲王宇飞齐爱谊曲阜师范大学物理工程学院山东济宁273165 潍坊先进光电芯片研究院山东潍坊261000 中国科学院半导体研究所固态光电信息技术实验室北京100083 潍坊大学物理与电子信息学院山东潍坊261061

为了改善用于铷原子钟的795 nm垂直腔面发射激光器(VCSEL)的偏振稳定性,研究了不同氧化孔径和椭圆度对VCSEL偏振性能的影响。利用COMSOL Multiphysics的波动光学频域模块模拟了不同氧化孔径对有源区谐振光强的影响。结果表明,当氧化孔径... 详细信息

为了改善用于铷原子钟的795 nm垂直腔面发射激光器(VCSEL)的偏振稳定性,研究了不同氧化孔径和椭圆度对VCSEL偏振性能的影响。利用COMSOL Multiphysics的波动光学频域模块模拟了不同氧化孔径对有源区谐振光强的影响。结果表明,当氧化孔径为3.5~4.0μm时,有源区的谐振强度最高。采用可实时观察的湿法氧化系统,研究了氧化温度对氧化速率和氧化孔椭圆度的影响。随着注入电流的增加,三种不同椭圆氧化孔的VCSEL表现出不同的模式特性、偏振特性和偏振角旋转特性。测试结果表明,带有长轴径为3.7μm、椭圆度为1.7的椭圆氧化孔的VCSEL性能最佳。在85℃下,当注入电流为1.5 mA时,输出功率为0.86 mW,激光波长为795.4 nm,边模抑制比(SMSR)为43 dB,线宽为65 MHz,正交偏振抑制比(OPSR)为23.8 dB。在0.6~2.7 mA的范围内,VCSEL的主偏振方向保持不变。

关键词：激光器垂直腔面发射激光器氧化孔径湿法氧化正交偏振抑制比窄线宽

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高功率1060 nm垂直腔面发射激光器

光学学报 2024年第2期44卷 229-235页

作者：郑妹茵渠红伟周旭彦董风鑫张建心隋佳桐孟凡胜谢中华王海玲王宇飞齐爱谊曲阜师范大学物理工程学院山东曲阜273165 潍坊先进光电芯片研究院山东潍坊261000 中国科学院半导体研究所固态光电信息技术重点实验室北京100083 潍坊学院物理与电子信息学院山东潍坊261061

为了提高1060 nm垂直腔面发射激光器(VCSEL)的性能,本文对大功率1060 nm VCSEL进行了理论模拟和实验研究。计算得到红移速度为0.40 nm/K,据此确定增益和腔模失配量为-20 nm。对比分析了6种不同InGaAs组分和厚度的量子阱,以及3种不同势... 详细信息

为了提高1060 nm垂直腔面发射激光器(VCSEL)的性能,本文对大功率1060 nm VCSEL进行了理论模拟和实验研究。计算得到红移速度为0.40 nm/K,据此确定增益和腔模失配量为-20 nm。对比分析了6种不同InGaAs组分和厚度的量子阱,以及3种不同势垒材料的增益特性和输出特性,模拟结果表明,应变补偿的InGaAs/GaAsP量子阱有源区在温度稳定性、阈值电流以及功率方面更有优势。对P型分布式布拉格反射镜(DBR)进行优化设计,优化DBR渐变层厚度和对数,有助于获得更好的输出特性。采用金属有机化学气相沉积生长了InGaAs/GaAsP应变补偿量子阱结构的VCSEL外延片,并制备了单管和阵列VCSEL,实验数据和理论分析基本吻合。实验测得,288单元VCSEL阵列在4.5 A电流下,连续输出功率为2.62 W,最高电光转换效率为36.8%,5 mm×5 mm VCSEL阵列准连续条件下(脉宽为100μs,占空比为1%),且在100 A电流下,获得峰值功率为53.4 W。

关键词：垂直腔面发射激光器高功率应变补偿分布式布拉格反射镜效率

Brain Mechanisms Underlying Panic Attack and Panic Disorder

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Neuroscience Bulletin 2024年第6期40卷 795-814页

作者： xuyan Guan Peng Cao Tsinghua Institute of Multidisciplinary Biomedical Research Tsinghua UniversityBeijing102206China National Institute of Biological Sciences(NIBS) Beijing102206China

Panic disorder is a psychiatric disorder characterized by recurrent panic attacks,with a prevalence of~4%in the general population,causing heavy personal and socioeconomic *** similarities of animal defense responses to clinical panic attack symptoms in humans make it possible to translate neuroanatomical pathways identified in animal studies to panic disorder in ***,in this review we first present a basic overview of panic disorder in humans including the main subtypes,models commonly used to trigger panic attacks,related hypotheses,the neurotransmitter systems that may be involved,and the current clinical treatments to give the reader a comprehensive understanding of panic *** animal section introduces the models that trigger panic-like behavior in animals and the brain regions that may be involved,providing insights for future elucidation of the neural circuit mechanisms behind panic attacks.

关键词： Panic disorder Panic attack Defense responses Animal studies Humans

High efficiency of spectral beam combining by using large optical cavity lasers

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Chinese Optics Letters 2022年第6期20卷 35-39页

作者： Xiaoxu Xing xuyan zhou Hongwei Qu Weiqiao Zhang Lingqian Meng Jing Liu Yufei Wang Wanhua Zheng Laboratory of Solid-State Optoelectronics Information Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083 China College of Materials Science and Optoelectronic Technology University of Chinese Academy of SciencesBejing 100049China Weifang Academy of Advanced Optoelectronic Circuits Weifang 261021China State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBejing 100083China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBejjng 100049China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBejing 100049China

We studied the spectral beam combining[SBC]of a large optical cavity[LOC]laser array to achieve high-power and highbrightness laser *** discussed the characteristics of the external cavity feedback efficiency and the focal length of the transform lens for lasers with different waveguide *** have found that using LOC laser diodes can increase the proportion of external cavity feedback,thereby improving the SBC *** a current of 90 A,the CW output power of the SBC system is 59.2 W,and the SBC efficiency reaches up to 102.8%.All emitters of the laser array have achieved spectral locking with a spectral width of 11.67 nm,and the beam parameter product is 4.38 mm·mrad.

关键词： spectral beam combining large optical cavity high efficiency

High peak power density and low mechanical stress photonic-band-crystal diode laser array based on non-soldered packaging technology

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Chinese Optics Letters 2022年第7期20卷 30-35页

作者： Jing Liu Mingjin Wang Yufei Wang xuyan zhou Ting Fu Aiyi Qi Hongwei Qu Xiaoxu Xing Wanhua Zheng Laboratory of Solid-State Optoelectronics Information Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China College of Future Technology University of Chinese Academy of SciencesBeijing 101408China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China

A high peak power density and low mechanical stress photonic-band-crystal(PBC)diode laser array based on non-soldered packaging technology is *** array consists of the PBC diode laser bars with small fast axis divergence ***,we design the non-soldered array structure that realizes mechanical stacking of 10 bars in the vertical *** the experiment,the peak power density of the PBC array is about 1.75 times that of the conventional array when the same total power is *** peak power of the non-soldered array is 292.2 W,and the“smile”effect is improved by adjusting the mechanical fixing force of the array.

关键词： photonic-band-crystal non-soldered packaging low mechanical stress

Narrow vertical beam divergence angle for display applications of 645 nm lasers

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Chinese Optics Letters 2021年第10期19卷 44-48页

作者： Yufei Jia Yufei Wang xuyan zhou Linhai Xu Pijie Ma Jingxuan Chen Hongwei Qu Wanhua Zheng Laboratory of Solid State Optoelectronics Information Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China College of Future Technology University of Chinese Academy of SciencesBeijing 101408China State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China

We design a 645 nm laser diode(LD)with a narrow vertical beam divergence angle based on the mode expansion *** vertical beam divergence of 10.94°at full width at half-maximum is realized under 1.5 A continuous-wave operation,which is the smallest vertical beam divergence for such an LD based on the mode expansion layer,to the best of our *** threshold current and output power are 1.07 A and 0.94 W,limited by the thermal rollover for the 100μm wide and 1500μm long broad area laser,and the slope efficiency is 0.71 W/*** low coherence device is fabricated with the speckle contrast of 3.6%and good directional *** 645 nm LDs have promising applications in laser display.

关键词： beam divergence laser diode speckle laser display