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A continuous-wave Nd:YVO_(4)-KGW intracavity Raman laser with over 34% diode-to-Stokes optical efficiency

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High Power Laser Science and Engineering 2024年第2期12卷 62-68页

作者： Quan Sheng Jingni Geng Tianchang Liu Shijie Fu Wei Shi jianquan yao Institute of Laser and Optoelectronics School of Precision Instrument and Optoelectronics EngineeringTianjin UniversityTianjinChina Key Laboratory of Optoelectronic Information Technology(Ministry of Education) Tianjin UniversityTianjinChina

We demonstrate a continuous-wave(CW)Nd:YVO_(4)-potassium gadolinium tungstate(KGW)intracavity Raman laser with a diode-to-Stokes optical efficiency of 34.2%.By optimizing the cavity arrangement and reducing the cavity losses,8.47 W Stokes output at 1177 nm was obtained under an incident 878.6 nm diode pump power of 24.8 *** influence of cavity losses on the power and efficiency of the CW Raman laser,as well as the potential for further optimization,was investigated based on the numerical *** observation of thermally-induced output rollover was well explained by the calculation of the thermal lensing and cavity stability,indicating that the end-face curvature played an important role when the end-face of the crystal was highly reflective coated to make the cavity.A 10.9 W Stokes output under 40.9 W incident pump was also demonstrated with a cavity arrangement less sensitive to the end-face curvature,which is the highest output power of CW intracavity Raman lasers reported.

关键词： continuous wave intracavity Raman laser KGW crystal thermal lens

High photoelectric conversion efficiency and fast relaxation time of FA_(0.4)MA_(0.6)PbI_(3) applied in ultrafast modulation of terahertz waves

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Journal of Energy Chemistry 2024年第4期91卷 299-305页

作者： Zhibo Xu Ying Zeng Xinran Zhao Xiaoyin Chen Aoyu Fan Furi Ling Jiang Li jianquan yao School of Optics and Electronic Information Huazhong University of Science and TechnologyWuhan 430074HubeiChina College of Precision Instrument and Optoelectronics Engineering Tianjin UniversityTianjin 300072China Institute of Fluid Physics China Academy of Engineering PhysicsMianyang 621900SichuanChina School of Information Engineering Wuhan University of TechnologyWuhan 430070HubeiChina National Engineering Research Center of Fiber Optic Sensing Technology and Networks Wuhan University of TechnologyWuhan 430070HubeiChina Hubei Key Laboratory of Broadband Wireless Communication and Sensor Networks Wuhan 430070HubeiChina

Active control of terahertz(THz)waves is attracting tremendous attentions in terahertz communications and active photonic ***,due to its excellent photoelectric conversion performance and simple manufacturing process,has emerged as a promising candidate for optoelectronic ***,the exploration of perovskites in optically controlled THz modulators is still *** this work,the photoelectric properties and carrier dynamics of FA_(0.4)MA_(0.6)PbI_(3)perovskite films were investigated by optical pumped terahertz probe(OPTP)*** ultrafast carrier dynamics reveal that FA_(0.4)MA_(0.6)PbI_(3)thin film exhibits rapid switching and relaxation time within picosecond level,suggesting that FA_(0.4)MA_(0.6)PbI_(3)is an ideal candidate for active THz devices with ultrafast ***,as a proof of concept,a FA_(0.4)MA_(0.6)PbI_(3)-based metadevice with integrating plasma-induced transparency(PIT)effect was fabricated to achieve ultrafast modulation of THz *** experimental results demonstrated that the switching time of FA_(0.4)MA_(0.6)PbI_(3)-based THz modulator is near to 3.5 ps,and the threshold of optical pump is as low as 12.7μJ cm^(-2).The simulation results attribute the mechanism of ultrafast THz modulation to photo-induced free carriers in the FA_(0.4)MA_(0.6)PbI_(3)layer,which progressively shorten the capacitive gap of PIT *** study not only illuminates the potential of FA_(0.4)MA_(0.6)PbI_(3)in THz modulation,but also contributes to the field of ultrafast photonic devices.

关键词： Terahertz modulation Perovskites Metamaterials Plasmon-induced transparency

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基于电化学金属化的偏振无关超表面光开关

激光与光电子学进展 2024年第13期61卷 402-408页

作者：吴凯陈治良李忠洋邴丕彬徐娟张红涛谭联姚建铨华北水利水电大学电气工程学院天津大学精密仪器与光电工程学院激光与光电子研究所

提出了一种工作在1.55μm波长处的基于电化学金属化的偏振无关超表面光开关。该器件子单元包括硅衬底，二氧化硅介质层和嵌入二氧化硅中的银十字结构。子单元之间导电细丝的形成和断裂可以改变银十字结构的共振波长，从而触发光开关的... 详细信息

提出了一种工作在1.55μm波长处的基于电化学金属化的偏振无关超表面光开关。该器件子单元包括硅衬底，二氧化硅介质层和嵌入二氧化硅中的银十字结构。子单元之间导电细丝的形成和断裂可以改变银十字结构的共振波长，从而触发光开关的开启或关闭。数值结果表明，所提出的超表面光开关在1.55μm波长处的消光比可以达到14 dB以上，并且对于横电（TE）模和横磁（TM）模的光不敏感。所提出的器件有望解决高功耗和大规模光开关的问题，可用于光开关、光调制、光存储和计算以及大规模光子集成器件中。

关键词：电化学金属化偏振无关导电细丝光开关超表面

高效率连续波Nd∶YVO_(4)/KGW内腔拉曼激光器

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中国激光 2024年第5期51卷 19-23页

作者：盛泉耿婧旎李锦辉付士杰史伟姚建铨天津大学精密仪器与光电子工程学院天津300072 天津大学光电信息技术教育部重点实验室天津300072 东南大学成贤学院江苏南京210088

报道了基于Nd∶YVO_(4)激光晶体和钨酸钆钾(KGW)拉曼晶体的端面泵浦连续波内腔拉曼激光器,实验研究了基频激光偏振方向对KGW拉曼激光器输出功率、光谱和模式特性的影响。当基频光偏振方向平行于KGW晶体的Nm轴时,901 cm^(-1)拉曼频移增... 详细信息

报道了基于Nd∶YVO_(4)激光晶体和钨酸钆钾(KGW)拉曼晶体的端面泵浦连续波内腔拉曼激光器,实验研究了基频激光偏振方向对KGW拉曼激光器输出功率、光谱和模式特性的影响。当基频光偏振方向平行于KGW晶体的Nm轴时,901 cm^(-1)拉曼频移增益较高,在36.6 W半导体激光泵浦功率下获得了6.63 W的1177.3 nm连续波斯托克斯光输出,光光效率和斜效率分别为18.1%和24.7%;而当基频光沿KGW晶体Ng轴偏振时,由于768 cm^(-1)和901 cm^(-1)两条拉曼谱线的竞争以及对应89 cm^(-1)小波数拉曼峰的级联拉曼斯托克斯光起振,拉曼激光器的光谱和功率特性均发生劣化。在实验中还观察到KGW像散的热透镜效应对激光模式产生的影响。

关键词：激光器受激拉曼散射连续波拉曼激光器内腔拉曼激光器钨酸钆钾晶体

57 W 2.05μm单横模掺铥光纤激光MOPA

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中国激光 2024年第8期51卷 32-37页

作者：罗学文张露付士杰盛泉张钧翔史伟姚建铨天津大学精密仪器与光电子工程学院天津300072 天津大学光电信息技术教育部重点实验室天津300072

基于商用单模掺铥石英光纤设计了高功率2.05μm波段全光纤主振荡功率放大器(MOPA)。以自制环形腔掺铥光纤激光器为种子,利用级联滤波型波分复用器优化长波长种子的光信噪比,基于MOPA结构实现了高效的高功率输出。基于速率方程模型,理论... 详细信息

基于商用单模掺铥石英光纤设计了高功率2.05μm波段全光纤主振荡功率放大器(MOPA)。以自制环形腔掺铥光纤激光器为种子,利用级联滤波型波分复用器优化长波长种子的光信噪比,基于MOPA结构实现了高效的高功率输出。基于速率方程模型,理论分析了主放大级的注入信号光功率和增益光纤长度的优化关系;实验中在102.6 W的793 nm泵浦功率下获得了输出功率为57 W、光谱线宽为0.08 nm、光信噪比为58.8 dB的单横模激光输出,主放大级斜效率为52.6%。

关键词：激光器掺铥光纤激光器 2μm激光单模光纤激光器速率方程

Enhanced picosecond terahertz wave generation based on cascade effects in a terahertz parametric generator

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Chinese Physics B 2024年第8期33卷 271-275页

作者：张敬喜王与烨徐炳烽陈锴刘紫鲲马鸿儒徐德刚姚建铨 School of Precision Instruments and Optoelectronics Engineering Tianjin UniversityTianjin 300072China Key Laboratory of Optoelectronic Information Technology(Ministry of Education) Tianjin UniversityTianjin 300072China

Enhanced terahertz wave generation via a Stokes cascade process has been demonstrated using picosecond pulse pumped terahertz parametric generation at 1 kHz repetition *** cascade saturation of terahertz output was observed,and the corresponding cascade-Stokes spectra were *** maximum terahertz wave average power was 22μW under a pump power of 30 W,whereas the maximum power conversion efficiency was 8×10^(-7)under a pump power of 21 *** THz power fluctuation was measured to be about 1%in 20 *** THz parametric source with a relatively stable output is suitable for a variety of practical applications.

关键词： terahertz parametric generation stimulated polariton cascade effect CLN crystal

基于可饱和吸收体的700 mW单频2.05μm线性腔铥钬共掺光纤激光器

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中国激光 2024年第6期51卷 9-13页

作者：蒋沛恒史朝督陈林付士杰盛泉付彩玲史伟姚建铨天津大学精密仪器与光电子工程学院天津300072 天津大学光电信息技术教育部重点实验室天津300072 深圳大学物理与光电工程学院光电子器件与系统教育部/广东省重点实验室广东深圳518060

报道了基于掺铥光纤可饱和吸收体的单频2.05μm线性腔铥钬共掺全光纤振荡器。腔内采用4.6 m长的铥钬共掺光纤作为增益介质,并利用未被泵浦的掺铥光纤作为可饱和吸收体实现选频,通过调整可饱和吸收体的长度可优化选频能力。在3.5 W的1570... 详细信息

报道了基于掺铥光纤可饱和吸收体的单频2.05μm线性腔铥钬共掺全光纤振荡器。腔内采用4.6 m长的铥钬共掺光纤作为增益介质,并利用未被泵浦的掺铥光纤作为可饱和吸收体实现选频,通过调整可饱和吸收体的长度可优化选频能力。在3.5 W的1570 nm激光泵浦下,获得了最高714 mW的2048.6 nm单频激光输出,相应的斜率效率为25.1%,激光光谱线宽为17 kHz。

关键词：激光器单频光纤激光器铥钬共掺光纤可饱和吸收体 2μm激光

An all-silicon design of a high-efficiency broadband transmissive terahertz polarization convertor

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Frontiers of Optoelectronics 2023年第4期16卷 91-99页

作者： Xiaohua Xing Die Zou Xin Ding jianquan yao Liang Wu College of Precision Instrument and Optoelectronics Engineering Key Laboratory of Optoelectronics Information and Technology(Ministry of Education)Tianjin UniversityTianjin 300072China

Polarization,a fundamental behavior of electromagnetic waves,holds immense potential across diverse domains such as environmental monitoring,biomedicine,and ocean ***,achieving efcient modulation of terahertz waves with wide operational bandwidth poses signifcant ***,we introduce an all-silicon polarization converter designed specifcally to operate in the terahertz range of the electromagnetic *** results demonstrate that the average conversion efciency of cross-linear waves exceeds 80%across a wide frequency range spanning from 1.00 to 2.32 THz,with the highest conversion efciency peaking at an impressive 99.97%.Additionally,our proposed structure facilitates linear-to-circular polarization conversion with an ellipticity of 1 at 0.85 ***,by rotating the crossshaped microstructure,active control over arbitrary polarization states can be *** summarize,the proposed structure ofers remarkable fexibility and ease of integration,providing a reliable and practical solution for achieving broadband and efcient polarization conversion of terahertz waves.

关键词： Broadband High efficiency Polarization conversion All-silicon

kHz、mJ量级的可调谐MgO∶PPLN中红外光参量振荡器

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中国激光 2024年第7期51卷 227-233页

作者：刘帅陈锴孙悦闫超乔鸿展常继英李吉宁王与烨钟凯徐德刚姚建铨天津大学精密仪器与光电子工程学院天津300072 天津大学光电信息技术教育部重点实验室天津300072 天津大学微光机电系统技术教育部重点实验室天津300072

3~5μm中红外波段激光在大气中具有较高的透过率,因此被广泛应用于光电对抗等领域。报道了基于掺杂氧化镁的周期极化铌酸锂(MgO∶PPLN)晶体的kHz、mJ量级的中红外光学参量振荡器(OPO)。采用纳秒脉冲1064 nm激光泵浦基于多周期MgO∶PPLN... 详细信息

3~5μm中红外波段激光在大气中具有较高的透过率,因此被广泛应用于光电对抗等领域。报道了基于掺杂氧化镁的周期极化铌酸锂(MgO∶PPLN)晶体的kHz、mJ量级的中红外光学参量振荡器(OPO)。采用纳秒脉冲1064 nm激光泵浦基于多周期MgO∶PPLN晶体的OPO,OPO采用泵浦双通单谐振平凹腔结构。中红外激光的重复频率为1 kHz,4.08μm处输出的最高单脉冲能量达到1.041 mJ。最高光-光转换效率为16.8%,斜效率为19.3%,中红外激光脉宽约为9.53 ns。在最高能量输出时,OPO运转30 min时输出功率的均方根(RMS)为0.24%。通过温度-极化周期结合的调谐方式,OPO在3.49~4.18μm的较宽范围内都能够保持0.9 W以上平坦的高能量输出。在极化周期27.5~29.6μm以及温度25~200℃的调节范围内,闲频光波长的调谐范围为3.49~4.48μm。实现了重复频率为kHz量级、单脉冲能量为mJ量级的可调谐中红外输出,其在光电对抗领域具有应用价值。

关键词：激光器中红外激光掺杂氧化镁的周期极化铌酸锂全固态激光器光参量振荡器