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Narrow-linewidth BaGa_(4)Se_(7) optical parametric oscillator

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Chinese Optics Letters 2022年第4期20卷 54-59页

作者： Jintian Bian Hui Kong Qing Ye jiyong yao Lei Guo Xiaoquan Sun State Key Laboratory of Pulsed Power Laser Technology National University of Defense TechnologyHefei 230037China Advanced Laser Technology Laboratory of Anhui Province Hefei 230037China Key Laboratory of Functional Crystals and Laser Technology Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Mechanics and Photoelectric Physics Anhui University of Science and TechnologyHuainan 232001China

The linewidth of the BaGa_(4)Se_(7)(BGSe)optical parametric oscillator(OPO)was narrowed for the first time,to the best of our knowledge,by inserting a Fabry-Perot(FP)etalon into an L-shaped *** a 15 mm long BGSe(56.3°,0°)was pumped by a 1064 nm laser,the peak wavelength was〜3529 nm,and the linewidth was 4.53 nm[3.64 cm^(-1)]under type I phase *** inserting a 350μm thick FP etalon,the linewidth was decreased to 1.27-2.05 *** the tilt angle of the etalon was 2.34°,the linewidth was 2.05 nm[1.65 cm^(-1)],and the peak wavelength was still〜3529 *** the tilt angle of the etalon was 3.90°,the peak wavelength was 3534.9 nm,and the linewidth was 1.27 nm(1.02 cm^(-1)),which was the narrowest linewidth of a BGSe OPO,to the best of our *** beam quality was also improved after inserting the FP etalon.

关键词： optical parametric oscillation narrow linewidth BaGa_(4)Sc_(7)

Widely tunable continuous-wave visible and mid-infrared light generation based on a dual-wavelength switchable and tunable random Raman fiber laser

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Photonics Research 2023年第5期11卷 808-816页

作者： HAN WU WEIZHE WANG BO HU YANG LI KAN TIAN RUI MA CHUNXIAO LI JUN LIU jiyong yao HOUKUN LIANG College of Electronics and Information Engineering Sichuan UniversityChengdu 610064China International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Beijing Center for Crystal Research and Development Key Laboratory of Functional Crystals and Laser TechnologyTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Nonlinear frequency conversion of wavelength agile and high-power random fiber lasers can provide a promising way to generate continuous-wave(CW)visible and mid-infrared(MIR)light with unique properties such as the continuous modeless spectrum,low temporal/spatial coherence,and high temporal ***,we report a dual-wavelength switchable and tunable random Raman fiber laser(RRFL)based on a phosphosilicate fiber that has two Raman gain peaks for the first time and demonstrate its superior capability to generate widely tunable CW visible and mid-infrared light via nonlinear frequency *** using the combination of a tunable pump and two tunable gratings in Littrow configuration that can provide separated point feedback for the two Stokes wavelengths corresponding to silica-and phosphorus-related Raman peaks,the spectrum of an RRFL can be flexibly manipulated for the aim of nonlinear frequency conversions,including single-wavelength tunable emission at the 1.1μm or 1.2μm band for second-harmonic generation(SHG),dual-wavelength simultaneously tunable emission at the 1.1μm and 1.2μm bands for the sum-frequency generation(SFG),and dual-wavelength separation tunable emission for difference-frequency generation(DFG).As a result,with the combination of SHG and SFG in a periodically poled lithium niobate crystal array,we experimentally demonstrate the broadest tuning range(560-630 nm)of visible light generated from an RRFL,to the best of our *** tunable MIR light in the range of 10.7-12.3μm is also demonstrated through DFG of an RRFL operating in separation tunable dual-wavelength emission mode in a Ba Ga4Se7(BGSe)crystal,which is the first realization of>10μm CW DFG in the BGSe *** believe the developed dual-wavelength switchable and tunable RRFL can provide a new compact,robust,and cost-effective platform to realize broadly tunable light in both the visible and MIR regions,which can also find potential applications in imaging,sensing,and tem

关键词： tunable fiber tuning

A compact and efficient 4.25 μm BaGa4Se7 optical parametric oscillator

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Chinese Optics Letters 2019年第12期17卷 49-52页

作者： Minqiang Kang Ying Deng Xiongwei Yan Xiaoming Zeng Yangwu Guo jiyong yao Fa Zeng Jiangang Zheng Kainan Zhou Chongbing Qu Jingqin Su Qihua Zhu Research Center of Laser Fusion China Academy of Engineering PhysicsMianyang 621900China Collaborative Innovation Center of IFSA(CICIFSA) Shanghai Jiao Tong UniversityShanghai 200240China Science and Technology on Plasma Physics Laboratory Mianyang 621900China Center for Crystal Research and Development Key Laboratory of Functional Crystals and Laser TechnologyTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Graduate School of China Academy of Engineering Physics Beijing 100088China

We report an efficient mid-infrared extracavity optical parametric oscillator(OPO)based on the nonlinear crystal BaGa4Se7 pumped by a diode-side-pumped Q-switched Nd:Y3 Al5O12(Nd:YAG)*** maximum pulse energy of 1.03mJ at 4.25μm is obtained with the repetition rate of 10 Hz and pulse width of 12.6 ns when the pump energy was 13.5mJ,corresponding to an optical-to-optical conversion efficiency of 7.6% from 1.064μm to 4.25μ*** idler wave slope conversion efficiency was 12%.To the best of our knowledge,it is the highest reported conversion efficiency for the compact BaGa4Se7 OPO driven by the Nd:YAG laser.

关键词： Nd:YAG pumped optical

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新型红外非线性光学晶体硒镓钡的性质与应用

中国激光 2022年第1期49卷 76-85页

作者：孟祥鹤李壮姚吉勇中国科学院理化技术研究所北京100190 中国科学院大学北京100049

硒镓钡(BaGa_(4)Se_(7))晶体是一种新型宽带隙红外非线性光学材料,其在频率下转换输出中远红外激光方面有着独特的优势和良好的应用前景。国内外研究者对其性质和应用进行了广泛的研究。本文总结了近期关于BaGa_(4)Se_(7)(BGSe)晶体的... 详细信息

硒镓钡(BaGa_(4)Se_(7))晶体是一种新型宽带隙红外非线性光学材料,其在频率下转换输出中远红外激光方面有着独特的优势和良好的应用前景。国内外研究者对其性质和应用进行了广泛的研究。本文总结了近期关于BaGa_(4)Se_(7)(BGSe)晶体的性质表征和激光频率转换方面的研究进展,并展望了未来研究方向。

关键词：激光光学钡镓硒性质表征激光频率转换

Synthesis,Structure,and Properties of Some Novel Actinide Chalcogenides

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Synthesis,Structure,and Properties of Some Novel Actinide Ch...

Widely tunable and high resolution mid‑infrared laser based on BaGa_(4)Se_(7)optical parametric oscillator

第15届全国晶体生长与材料学术会议

作者： jiyong yao Technical Institute of Physics and Chemistry, CAS, Beijing 100190.

Rb0.85U1.77S6 and RbU2Se6 were produced by means of the reactive flux method at temperatures of 973 and 923 K, respectively. These compounds feature UQ3 (Q = S, Se) layers, with the rubidium or thallium cations located between the layers. RbU2Se6 displays Curie-Weiss paramagnetic behavior, with an effective magnetic moment of 2.651(8) μB/U. The room temperature conductivity of RbU2Se6 is 6 x 10-5 S/cm along [100], indicating weak semiconducting behavior. Rb6Cu12U2S15 has been synthesized and its single crystal resistivity and theoretical electronic structure investigated. Previous physical property measurements on the isostructural compound, K6Cu12U2S15, in powder form found metallic like conductivity and a small magnetic moment. As the compound contains no S-S bonding, the charge can be balanced with U6+ but due to the determined metallic like conductivity, the compound was assigned an oxidation state of U5+ charge balancing with some unknown number of S1- anions. The presence of S1- allows for conduction to occur via delocalization of a S1- hole in the valence band. Resistivity measurements on single crystals of Rb6Cu12U2S15 found the resistance across a small crystal to be above 28 MΩ. Further magnetic measurements conducted in collaboration on a sample of crushed single crystals found a small moment smaller than what should be found for U5+, but if the compound does contain U6+ 5f 0 no moment should be found. The Cs analogue of this compound has also been synthesized in collaboration. All three compound show a thermally activated conduction mechanism with a very wide band gap. Presented here are original single crystal resistivity measurements on crystals of Rb6Cu12U2S15 and a theoretical investigation of it electronic structure. Using the LSDA+GGA method along with LSDA+GGA+U method show the material is indeed a wide band gap semiconductor and there is no evidence for a U magnetic moment. The band structure of the compound suggest a possible 5f 1 electronic str

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Frontiers of Optoelectronics 2023年第3期16卷 123-129页

作者： Qing Ye Hui Kong Jintian Bian jiyong yao Enlong Wang Yunlong Wu Haiping Xu Kaihua Wen Yihua Hu State Key Laboratory of Pulsed Power Laser Technology National University of Defense TechnologyHefei 230037China Advanced Laser Technology Laboratory of Anhui Province Hefei 230037China Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijing 100190China

The widely tunable and high resolution mid-infrared laser based on a BaGa_(4)Se_(7)(BGSe)optical parametric oscillator(OPO)was demonstrated.A wavelength tuning range of 2.76–4.64μm and a wavelength tuning resolution of about 0.3 nm were obtained by a BGSe(56.3°,0°)OPO,which was pumped by a 1064 nm *** is the narrowest reported wavelength tuning resolution for BGSe OPO,and was obtained by simultaneously controlling the angle and temperature of BGSe.

关键词： Widely tunable High resolution BaGa_(4)Se_(7) Optical parametric oscillator

Na2MnGe2Se6: A New Mn-based Antiferromagnetic Chalcogenide with Large Mn···Mn Separation

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Na2MnGe2Se6: A New Mn-based Antiferromagnetic Chalcogenide w...

BaGa4Se7与KTiOAsO4光参量振荡产生中红外激光性能对比

中国晶体学会第六届学术年会暨会员代表大会（非线性光学及激光晶体材料分会）

作者： Molin Zhou Wenlong Yin Fei Liang Arthur Mar Zheshuai Lin jiyong yao Yicheng Wu Beijing Center for Crystal Research and Development Technical Institute of Physics and Chemistry Chinese Academy of Sciences Key Laboratory of Functional Crystals and Laser Technology Chinese Academy of Sciences University of Chinese Academy of Sciences Department of Chemistry University of Alberta Institute of Chemical Materials Chinese Academy of Engineering Physics

A new one-dimensional(1D)Mn-based chalcogenide NaMnGeSe has been obtained by solid-state *** crystallizes in the tetragonal space group I4/mcm with unit cell parameters a=7.7718(16)?,b=7.7718(16)?,c=19.077(7)?and Z=*** the structure,MnSe and GeSe tetrahedra are linked alternately via edge-sharing with the ratio 1:2 to form 1D infinite

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红外与激光工程 2020年第6期49卷 164-170页

作者：孔辉卞进田叶庆姚吉勇吴昌孙晓泉国防科技大学脉冲功率激光技术国家重点实验室安徽合肥230037 先进激光技术安徽省实验室安徽合肥230037 中国科学院理化技术研究所北京100190

BaGa4Se7(硒镓钡,简称BGSe)与KTiOAsO4(砷酸氧钛钾,简称KTA)均可在1.06μm激光泵浦下产生中红外激光。首先仿真计算出两种非线性晶体的相位匹配曲线,结果显示:切割角为(56.3°,0°)的BGSe晶体在Ⅰ类相位匹配条件下和切割角为(90°,0°)... 详细信息

BaGa4Se7(硒镓钡,简称BGSe)与KTiOAsO4(砷酸氧钛钾,简称KTA)均可在1.06μm激光泵浦下产生中红外激光。首先仿真计算出两种非线性晶体的相位匹配曲线,结果显示:切割角为(56.3°,0°)的BGSe晶体在Ⅰ类相位匹配条件下和切割角为(90°,0°)的KTA在Ⅱ-A类相位匹配条件下均可产生~3.5μm的闲频光。然后理论计算出BGSe(56.3°,0°,Ⅰ类)的有效非线性系数为-11.9 pm/V,KTA(90°,0°,Ⅱ-A类)的有效非线性系数为-3.2 pm/V;在其他条件相同的情况下,15 mm长BGSe(56.3°,0°,Ⅰ类)的OPO振荡阈值是20 mm长KTA(90°,0°,Ⅱ-A类)OPO振荡阈值的35.11%。最后通过实验验证BGSe(56.3°,0°,I类,15 mm)的振荡阈值小于KTA(90°,0°,Ⅱ-A类,20 mm),输出的中红外激光能量大于KTA。因此,BGSe是一种极具应用前景的中红外非线性晶体。

关键词： BaGa4Se7 KTiOAsO4 光参量振荡中红外激光

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略论经济效益审计标准的改进及其作用

现代财经（天津财经大学学报） 2001年第1期21卷 44-45页

作者：姚继勇南开大学会计系天津300071

现行经济效益审计标准存在很多问题。经济效益审计标准应为 :在一定的经济环境下 ,考虑被审单位的特点及资源情况 ,被审单位能够达到的最高经济效益水平。这样制定审计标准 ,能够促进企业提高经济效益 ,更好地发挥经济效益审计的作用。

关键词：经济效益审计审计标准改进措施企业管理制度因素企业管理状况因素企业经营情况因素