SPIE/SIOM Pacific Rim Laser Damage最新文献_第7页

Study on damage of CaF2 windows irradiated by 248nm ultraviolet excimer laser 248nm紫外准分子激光辐照CaF2窗口损伤的研究

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2536378

Xi Wang, Yue Hu, Jiacheng Wu, Xin Li, Jingzhen Shao

{"title":"Study on damage of CaF2 windows irradiated by 248nm ultraviolet excimer laser","authors":"Xi Wang, Yue Hu, Jiacheng Wu, Xin Li, Jingzhen Shao","doi":"10.1117/12.2536378","DOIUrl":"https://doi.org/10.1117/12.2536378","url":null,"abstract":"It has very important application value to investigate the damage mechanism of CaF2 windows irradiated by ultraviolet excimer laser. As significant optical materials, CaF2 windows have been widely used in the ultraviolet photoelectrical field. Because the ultraviolet excimer laser presents favorable characteristics such as short wavelength and high photon energy, the high power excimer lasers are expected to be widely applied in precision laser machining and military field. In this paper, the experiment on damage in CaF2 windows irradiated by 248nm ultraviolet excimer laser was carried out. The damage characteristics of irradiated spots under different experiment conditions were detected by optical microscope. The laser induced damage thresholds of CaF2 windows were calculated by the zero damage probability through linear fitting. The damage mechanism of CaF2 windows were discussed based on the surface characteristics of damage spots. The experimental results indicated that the damage thresholds of zero probability for the 248nm excimer laser to CaF2 windows were 5.6J/cm2 of the incident surface, and 1.1J/cm2 of the exit surface respectively. When CaF2 windows was irradiated by 248nm excimer laser, its damage first occurred to its exit surface, the damage threshold of exit surface was smaller than that of incident surface. As the laser fluence increased gradually, the damage of exit surface was shown to grow exponential and its degree was significantly higher than that of incident surface. This work is helpful to further improve damage resistance of CaF2 windows in high power laser facility. It can provide the necessary references for selection of ultraviolet optical materials and optimization of application.","PeriodicalId":197837,"journal":{"name":"SPIE/SIOM Pacific Rim Laser Damage","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125427722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Annealing effects on the optical and structural properties of Y2O3 thin films deposited by thermal evaporation technique 退火对热蒸发Y2O3薄膜光学和结构性能的影响

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2539549

Shida Li, Hua-song Liu, Yugang Jiang, Meiping Zhu, Dan Chen, Xiao Yang, Lishuan Wang, Jiahuan He, Dongbai Xue

引用次数: 0

Wide-incident angle and low polarization aberration edge filter 宽入射角、低偏振像差边缘滤波器

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2539250

Shikun He, Gang Wang, Yuming Zhou, Ji-you Zhang, Qiaolin Huang, Li Wang

{"title":"Wide-incident angle and low polarization aberration edge filter","authors":"Shikun He, Gang Wang, Yuming Zhou, Ji-you Zhang, Qiaolin Huang, Li Wang","doi":"10.1117/12.2539250","DOIUrl":"https://doi.org/10.1117/12.2539250","url":null,"abstract":"Nowadays, optical elements are often shared in order to improve compactness of optical system and edge filter is one of the core parts. For same spectral system, when half convergence light incidents on edge filter, Sagittal and meridian will have different incident angle range, which cause different polarization characterization for the two directions and is harmful to the optical system’ MTF. In order to improve image quality, all factors affecting MTF are analyzed. When light incidents on edge filter, the difference between P and S polarization’s reflection phase can cause MTF drop. The design process of edge filter is optimized. Optical spectrum and reflection phase are optimized together. The variation is kept in a certain range for reflection phase of P and S polarization when edge filer attains spectrum requirement. The newly designed edge filter is sticked to optical system and carried out simulation. The calculation results showed that the newly designed edge filter has little effect on MTF. Ion-assisted e-beam evaporation method is used to deposit edge filter multilayer and the measurement result is in good accordance with that of the design. We think that a new design method is raised for design wide-incident angle and low polarization aberration edge filter.","PeriodicalId":197837,"journal":{"name":"SPIE/SIOM Pacific Rim Laser Damage","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116439616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Designing of converging stray light focal spot absorber in high power laser system 大功率激光系统中会聚散光焦斑吸收器的设计

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2539705

Tianran Zheng, F. Wang, Den'en Wang, X. Sun, Hong-jie Liu, Liangming Chen, D. Hu

引用次数: 1

Experimental observation and numerical analysis for dynamical output in free-running multi-longitudinal mode erbium doped fiber ring laser 自由运行多纵模掺铒光纤环形激光器动态输出的实验观察与数值分析

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2538520

Kai Tang, Yanping Xiao, Puheng Zhang, H. Liu

{"title":"Experimental observation and numerical analysis for dynamical output in free-running multi-longitudinal mode erbium doped fiber ring laser","authors":"Kai Tang, Yanping Xiao, Puheng Zhang, H. Liu","doi":"10.1117/12.2538520","DOIUrl":"https://doi.org/10.1117/12.2538520","url":null,"abstract":"In the field of complex optical systems, erbium doped fiber ring laser(EDFRL) is a kind of imperative fiber laser. Hundreds and thousands of longitudinal modes can typically coexist in this laser system, exhibiting nonlinear mode dynamics such as complex mode hopping and high-dimensional chaos. In this paper, dynamical output in free-running multi-longitudinal mode(MLM) EDFRL has been investigated experimentally and simulated numerically. Method to obtain real-time frequency and temporal intensity dynamics in group of dense individual longitudinal modes around central wavelength 1546.767nm is based on heterodyne detection, the utilized beat signal is generated by optical interference of adopted laser and reference laser. Frequency dynamics and time evolutions of heterodyne signal can be recorded by a radio frequency analyzer and fall graph. According to the experimental results, the output of MLM EDFRL mode dynamics is detected and the analysis for mode intensity can be obtained. Trying to simulate and explain the experimental observations, MLM laser model based on the saturable absorption of ions and ion-pairs in the gain medium, together with cross-coupling operation of corresponding longitudinal modes, has been discussed. The MLM laser model can effectively describe the individual behavior and clustering behavior of a large number of longitudinal modes, and reproduce theoretically the multi-mode dynamics of EDFRL system in frequency domain.","PeriodicalId":197837,"journal":{"name":"SPIE/SIOM Pacific Rim Laser Damage","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132069803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrical property of OSR second surface mirror in space radiation environments 空间辐射环境下OSR二次面镜的电学特性

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2535461

Zicai Shen, Xiaofeng Ma, Meiping Zhu, J. Shao

引用次数: 0

Laser conditioning mechanism in DKDP crystals analyzed by fluorescence and stimulated Raman scattering technique 利用荧光和受激拉曼散射技术分析了DKDP晶体的激光调理机制

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2540636

Yao Wang, J. Shao, Guohang Hu, Yuanan Zhao, Zhenzhou Cao, Da-wei Li, Xiaofeng Liu, Hongbo He

引用次数: 1

Improvement on fluorescent properties of photonic crystals filled by quantum dots based on multi-layer films 基于多层薄膜的量子点填充光子晶体荧光性能的改进

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2534519

Qingfei Meng, Lu Huang, Wei-min Shi, Yubin Zhu, Linjun Wang

引用次数: 0

Employing Ni-Cr co-doping to prepare low phase transition temperature VO2 film 采用Ni-Cr共掺杂制备低相变温度VO2薄膜

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2541404

Q. He, Dong-ping Zhang, Ying Huang, Y. Yang, Huan Guan, Jingcheng Jin, P. Fan

引用次数: 1

Study on 532nm and CO2 laser processing of fused silica glass 熔融石英玻璃的532nm和CO2激光加工研究

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2540722

Xiu-rong Du, Yuan-cheng Sun, Xiao-qiang Zhang, Xue-fu Song, Bo Fu, Ning Hua

引用次数: 1