SPIE/SIOM Pacific Rim Laser Damage最新文献_第3页

The light modulation of Hertzian microcracks on optical glass with thin film 光学玻璃上赫兹微裂纹的薄膜光调制

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2023-12-22 DOI: 10.1117/12.3015411

Xinyu Luo, Peng Yang, Qian Li, Jing Qiu, Guanjun Liu

引用次数: 0

Multi-physics coupling modeling for femtosecond laser damage in fused silica 熔融石英中飞秒激光损伤的多物理耦合建模

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2023-12-22 DOI: 10.1117/12.3021195

Hao Yang, Tong Yue, Yiguo Li, Wenbing Liu, Meixia Yang, Zhili Zheng, Yuhan Zhou, Quanxi Liu

引用次数: 0

Preparation of enhanced Al/MgF2 vacuum ultraviolet reflective coatings using electron-beam evaporation 利用电子束蒸发制备增强型铝/MgF2 真空紫外线反射涂层

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2023-12-22 DOI: 10.1117/12.3021031

Zhenfei Luo, Yaowei Wei, Fei Fan, Qinghua Zhang, Jian Wang

引用次数: 0

Research on the diffraction characteristics of reflecting volume Bragg gratings with different apodizing functions 不同光晕函数反射体布拉格光栅的衍射特性研究

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2023-12-22 DOI: 10.1117/12.3021064

Lili Zheng, Yunxia Jin, Fanyu Kong, Jing Sun, Y. dong, Jianwei Mo, Hongchao Cao, Yuxing Han

{"title":"Research on the diffraction characteristics of reflecting volume Bragg gratings with different apodizing functions","authors":"Lili Zheng, Yunxia Jin, Fanyu Kong, Jing Sun, Y. dong, Jianwei Mo, Hongchao Cao, Yuxing Han","doi":"10.1117/12.3021064","DOIUrl":"https://doi.org/10.1117/12.3021064","url":null,"abstract":"Reflective Volume Bragg Grating (RBG) recorded in photo-thermo-refractive glass offers notable advantages, including high efficiency, narrow bandwidth, and multiplexing capabilities, making them ideal for applications in dense wavelength division multiplexing (DWDM) and demultiplexing. However, the side lobes caused by sudden changes in coupling strength at both ends of the grating always lead to interchannel interference, which evidently affects the effectiveness of multiplexing and demultiplexing. In this work, a theoretical model of the apodization for RBG, which based on Kogelnik's coupled wave theory and F-matrix theory. It is simulated and analyzed the effects of three apodization functions including cosine, gaussian, and hyperbolic secant functions is established. The simulation results indicate that the side lobes of the RBG with apodization is significantly reduced and the peak efficiency is determined by the total refractive index modulation. This work provides a theoretical design basis and parameters optimizing method for the development of apodized RBG.","PeriodicalId":197837,"journal":{"name":"SPIE/SIOM Pacific Rim Laser Damage","volume":"50 6","pages":"129820H - 129820H-8"},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139164673","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

Laser damage characteristics and nanosecond laser conditioning of multilayer dielectric gratings for picosecond-petawatt laser systems 用于皮秒-皮特瓦激光系统的多层介质光栅的激光损伤特性和纳秒激光调理

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2023-12-22 DOI: 10.1117/12.3021418

Kun Shuai, Xiaofeng Liu, Yuanan Zhao, Keqiang Qiu, Dawei Li, Xiangkun Lin, He Gong, Jian Sun, Yaping Dai, Jianda Shao

{"title":"Laser damage characteristics and nanosecond laser conditioning of multilayer dielectric gratings for picosecond-petawatt laser systems","authors":"Kun Shuai, Xiaofeng Liu, Yuanan Zhao, Keqiang Qiu, Dawei Li, Xiangkun Lin, He Gong, Jian Sun, Yaping Dai, Jianda Shao","doi":"10.1117/12.3021418","DOIUrl":"https://doi.org/10.1117/12.3021418","url":null,"abstract":"Multilayer Dielectric Gratings (MLDGs) are the core optics of the picosecond-petawatt laser systems based on Chirped Pulse Amplification (CPA). The MLDGs encounter nanosecond- and picosecond-laser irradiation during the broadening and recompression of the laser pulse in CPA. Therefore, a comprehensive evaluation of the laser-induced damage performance of MLDG in the nanosecond (ns) and picosecond (ps) regimes is required. Herein, we examined the laser damage characteristics of MLDGs induced by the 8-ns and 8.6-ps laser pulses. In the two tested laser pulse widths, the damage of the MLDG was dominated by the nano absorbing defects and nodular defects, but the damage mechanism has changed. When the laser pulse width is shortened from ns to ps, the damage sites caused by the absorbing defects transfer from the interface to the grating pillars, where there is the maximum electric field. And the nodular ejection pit changes from a complete eruption to a local damage corresponding to the electric field enhancement region. For the nodular defects, ns-laser conditioning was introduced for removing them and achieved a maximum enhancement of 40% in the ps laser-induced damage threshold.","PeriodicalId":197837,"journal":{"name":"SPIE/SIOM Pacific Rim Laser Damage","volume":"76 9","pages":"1298203 - 1298203-6"},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139165184","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

Water dissolution ultra-precision continuous polishing of potassium dideuterium phosphate (DKDP) crystal 水溶解超精密连续抛光磷酸二氢钾（DKDP）晶体

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2023-12-22 DOI: 10.1117/12.3021149

Zhenchao Zhang, Bin Wang, Guanghui Tao, Wenchao Ji, Hanpeng Qian, Aihuan Dun

{"title":"Water dissolution ultra-precision continuous polishing of potassium dideuterium phosphate (DKDP) crystal","authors":"Zhenchao Zhang, Bin Wang, Guanghui Tao, Wenchao Ji, Hanpeng Qian, Aihuan Dun","doi":"10.1117/12.3021149","DOIUrl":"https://doi.org/10.1117/12.3021149","url":null,"abstract":"Traditional potassium dideuterium phosphate (DKDP) polishing techniques, such as single-point diamond flycutting (SPDF), magnetorheological polishing (MRF), and ion beam computation (IBF), are prone to edge collapse, subsurface damage, and small removal rates. In the study, the mechanism of crystal deliquescence is investigated based on the nature of DKDP crystal that are susceptible to deliquescence, and a method of water dissolution ultra-precision continuous polishing of DKDP crystal is proposed, with the corresponding water-in-oil solution configured as a polishing solution. The polishing solution proposed in the paper includes nonylphenol polyoxyethylene ether as a surfactant, glycerol monooleate as an oil phase, n-octanol as a cosurfactant, and pure water as an aqueous phase. The water nucleus in the polishing solution is squeezed, rubbed, and then deformed and ruptured by the action of the polishing pad and the rough peaks on the surface of the DKDP crystal, and the water molecules inside the ruptured water nucleus flow out and dissolve the surface of the crystal, resulting in the polishing of the DKDP crystal. The experimental results show that the water dissolution ultra-precision continuous polishing method can well alleviate the problems of subsurface damage and small removal rate of DKDP crystal brought by the conventional processing. DKDP crystal have surface roughness (Ra) of less than 12 nm and face shape accuracy (RMS) of less than 15 nm.","PeriodicalId":197837,"journal":{"name":"SPIE/SIOM Pacific Rim Laser Damage","volume":"219 5","pages":"129820G - 129820G-11"},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139165578","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

Control of the metallographic and mechanical properties of Cr8 cold-work die steel by laser continuous/dispersed quenching 通过激光连续/分散淬火控制 Cr8 冷作模具钢的金相和机械性能

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2023-12-22 DOI: 10.1117/12.3014244

Weiquan Kuang, Yu Zheng, Jie Chen, Wenwen Liu, Wenhai Peng, Zongyi Ye, Yu Cao

{"title":"Control of the metallographic and mechanical properties of Cr8 cold-work die steel by laser continuous/dispersed quenching","authors":"Weiquan Kuang, Yu Zheng, Jie Chen, Wenwen Liu, Wenhai Peng, Zongyi Ye, Yu Cao","doi":"10.1117/12.3014244","DOIUrl":"https://doi.org/10.1117/12.3014244","url":null,"abstract":"Laser continuous/dispersed quenching techniques were used for surface hardening Cr8 cold work die steel, and its metallographic microstructures and mechanical properties are investigated in this work. Typical mixed structure which composed of carbides in different morphologies and acicular martensite can be obtained by laser quenching. The excellent wear resistance and surface hardness of Cr8 die steel are attributed to the synergistic effect of solid solution strengthening, grain refinement and high dislocation density. Meanwhile, the phase change hardening layer structure and residual tensile stress induced by full area coverage scanning (LCQ) are the main factors to deteriorate the impact toughness and bending performance after laser quenching. The soft substrate-hardened unit structure with laterally spaced distribution (LDQ) obtained by graphical scanning reduces the heat accumulation effect on the surface, which reduces concentration of deformation near the hardened layer. The bending property and fracture mechanism are studied. Compared with the forging die material treated by LCQ, the impact energy and bending resistances of forging die materials treated by LDQ are enhanced significantly. Consequently, Cr8 die steel takes into account the same wear resistance, and scanning strategy should be controlled to retain more interval distribution hardening units in layer structure for superior impact toughness and bending properties.","PeriodicalId":197837,"journal":{"name":"SPIE/SIOM Pacific Rim Laser Damage","volume":"64 8","pages":"129820V - 129820V-18"},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139164203","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

Nodular defects induced laser damage of 532 nm thin-film polarizers 532 nm 薄膜偏振片的结节状缺陷诱发激光损伤

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2023-12-22 DOI: 10.1117/12.3018261

Xuyi Liu, Cao Feng, Weili Zhang, Humbet Nasibli, Yuanan Zhao, Xiaofeng Liu, Kun Shuai, Jianda Shao

引用次数: 0

Effect of organic pollution on surface quality and laser damage in fused silica 有机污染对熔融石英表面质量和激光损伤的影响

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2023-12-22 DOI: 10.1117/12.3015869

Zhigang Yuan, Jie Li, Qiancai Wei, Lian Zhou, Weihui Deng, Qinghua Zhang, Jian Wang, Bo Zhong

引用次数: 0

Investigation on environmental adaptation of polyimide film in space applications 聚酰亚胺薄膜在太空应用中的环境适应性研究

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2023-12-22 DOI: 10.1117/12.3018826

Yigang Ding, Zicai Shen, Yongqiang Mou, Huiqi Zheng, Shijin Wang, Zhenyi Qi

{"title":"Investigation on environmental adaptation of polyimide film in space applications","authors":"Yigang Ding, Zicai Shen, Yongqiang Mou, Huiqi Zheng, Shijin Wang, Zhenyi Qi","doi":"10.1117/12.3018826","DOIUrl":"https://doi.org/10.1117/12.3018826","url":null,"abstract":"Polyimide films have high strength, low density, excellent thermal stability, good insulating properties, excellent UV stability and infrared transmittance, and are widely used in thermal control structures on spacecraft, solar arrays and other components, as well as solar sails and other inflatable deployment structures, and the commonly used films include aluminized polyimide films, antistatic aluminized polyimide films, germanium plating polyimide films, and carburized black polyimide films, etc. Due to long-term exposure to the various space environments, their properties will be seriously degraded, such as thermo-optical properties, electrical properties, and mechanical properties. In this paper, for the application of polyimide film in spacecraft, we analyze the application performance requirements, introduce the influence of space environment on film materials. For these above materials, the results of the study of the degradation of the performance of these polyimide films under the action of space particle radiation, solar ultraviolet radiation, atomic oxygen and other environments were presented.","PeriodicalId":197837,"journal":{"name":"SPIE/SIOM Pacific Rim Laser Damage","volume":"30 S13","pages":"129820E - 129820E-9"},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139163841","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