Sixteenth National Conference on Laser Technology and Optoelectronics最新文献

Optical digital-to-analog conversion based on weighted fiber coupler 基于加权光纤耦合器的光数模转换

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-09-09 DOI: 10.1117/12.2603082

Zhaoyun Li, Yaxian Fan, Zhiyong Tao, H. Liu, Haiyue Pang, Yukun Zhang

引用次数: 0

Research on polishing process of aluminum alloy curved surface by nanosecond laser beam coupling 纳秒激光耦合铝合金曲面抛光工艺研究

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2603072

Xianyou Chen, Xiaoxiao Chen, Yuan Li, Wenwu Zhang, X. Shen

{"title":"Research on polishing process of aluminum alloy curved surface by nanosecond laser beam coupling","authors":"Xianyou Chen, Xiaoxiao Chen, Yuan Li, Wenwu Zhang, X. Shen","doi":"10.1117/12.2603072","DOIUrl":"https://doi.org/10.1117/12.2603072","url":null,"abstract":"The coupled nanosecond laser processing system was used for processing 6061 aluminum alloy in this paper. At first, we explored the relationship between laser processing parameters, such as laser power, laser repetition frequency, as well as scanning speed, and the processed surface quality for 6061 aluminum alloy plate sample. The optimal laser parameters were determined by the experiment of the flat plate sample processing, and then the paths of laser processing were designed and planned on the aluminum alloy with curved surface to explore the influence of curvature on the surface quality. The results show that the new processing technology of coupled nanosecond laser polishing could obtain good surface quality. The optimal laser processing parameters are average laser power of 5W, scanning speed of 500mm/min, and repetition frequency of 10kHz, which could reduce the surface roughness by 43%. In addition, the surface quality of the aluminum alloy is closer to the original surface as the curvature increased. And the convex surface has a lower surface roughness than the concave surface because the spot shape is different at different curvature positions. The coupled laser polishing process provides theoretical and technological support for the high-quality machining of 6061 aluminum alloy in this study.","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121049891","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

Simulation of energy distribution of water guided laser in different morphological water column 水导激光在不同形态水柱中的能量分布模拟

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2603050

Huan Long, Guangyi Zhang, Chunhai Guo, Yaowen Wu, Yang Chao, Zebin Pan, Wenwu Zhang

{"title":"Simulation of energy distribution of water guided laser in different morphological water column","authors":"Huan Long, Guangyi Zhang, Chunhai Guo, Yaowen Wu, Yang Chao, Zebin Pan, Wenwu Zhang","doi":"10.1117/12.2603050","DOIUrl":"https://doi.org/10.1117/12.2603050","url":null,"abstract":"Water-guided laser is a processing technology that uses a high-pressure water jet to guide the laser to act on the processing surface to complete material removal, which has the advantages of large processing depth, small heat-affected zone and good processing quality. However, the coupling efficiency of the beam in the water jet affects the processing quality. The coupling efficiency was found to be affected by the laminar flow quality of the water jet, which has an irregular shape on the surface of the water column ejected from the nozzle. This paper investigates the factors affecting the beam propagation quality and provides an in-depth study of the laminar surface state affecting the laminar light transmission. The laser energy distribution in laminar flow in different surface morphology was simulated with ZEMAX optical simulation software. The influence law on the light transmission efficiency of water jet is obtained, the more complex the surface morphology of the water jet, the worse the light transfer efficiency and the more serious the power loss. Lastly, the reasons affecting the laminar flow condition are analyzed, theoretical support is provided for efficient laminar flow coupling light transmission by water-guided laser.","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121221760","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

Recognition of underwater moving submarine based on lidar intensity image 基于激光雷达强度图像的水下运动潜艇识别

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2602013

Wei Zhao, Sining Li, Zhenshan Qiu, Jianfeng Sun, Yinbo Zhang, Hailong Zhang

引用次数: 0

Research on stability of laser-sustained pulsed plasma thruster 激光持续脉冲等离子体推力器稳定性研究

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2601649

yuhao zhan, Nanlei Li, Weijing Zhou

引用次数: 0

TAG magneto-optic ceramics and its application in high power optical isolators TAG磁光陶瓷及其在大功率光隔离器中的应用

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2603237

Jie Chen, Shengming Zhou

引用次数: 0

Review of terahertz nonreciprocal devices based on gyrotropic material InSb 基于回转体材料InSb的太赫兹非互易器件研究进展

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2602858

Zhiyu Tan, F. Fei, Chang Shengjiang

引用次数: 0

Absolute wavelength measurement of 633nm iodine stabilized He-Ne laser 633nm碘稳定He-Ne激光器的绝对波长测量

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2603069

Jianbo Wang, C. Yin, C. Shi, Hanping Wang, S. Cai, Tong Zhang

引用次数: 0

Multi-wavelength Q-switched random fiber laser based on stimulated Brillouin scattering and multimodal interference 基于受激布里渊散射和多模态干涉的多波长调q随机光纤激光器

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2603119

Haiyue Pang, Zhaoyun Li, Jianwei Zheng, Z. Tao, Yaxian Fan

{"title":"Multi-wavelength Q-switched random fiber laser based on stimulated Brillouin scattering and multimodal interference","authors":"Haiyue Pang, Zhaoyun Li, Jianwei Zheng, Z. Tao, Yaxian Fan","doi":"10.1117/12.2603119","DOIUrl":"https://doi.org/10.1117/12.2603119","url":null,"abstract":"We demonstrate a multi-wavelength Q-switched random fiber laser with the erbium-doped fiber as the gain medium and the Rayleigh scattering as the randomly distributed feedback in a 6 km long single-mode fiber. Q-switched pulses and sub-pulses with different repetition frequencies were generated with the pump power as 182 mW by combining the random cavity resonances and the Q-value modulation effect induced by the stimulated Brillouin scattering and nonlinear multimode interference in the graded-index multimode fiber. The pulse repetition rate increased continuously from 79 kHz to 113 kHz, and the corresponding pulse width exponentially decreased with the continuously increasing pump power, and a shortest pulse width of 1.85 μs was obtained. At the same time, a multi-wavelength spectrum with the equally spaced interval and an optical signal-to-noise ratio of ~31 dB was achieved. This laser has the unique properties different from the conventional resonant cavity lasers, which makes it a very promising light source in optical communication, imaging, and sensing applications.","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128154883","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

Variable polarization processing based on femtosecond laser 基于飞秒激光的变偏振处理

Sixteenth National Conference on Laser Technology and Optoelectronics Pub Date : 2021-08-31 DOI: 10.1117/12.2602929

Peichao Wu, Xiaowen Cao, Ling Zhao, Zhihao Chen, Hongbing Yuan, Mina Zhang, Wenwu Zhang

{"title":"Variable polarization processing based on femtosecond laser","authors":"Peichao Wu, Xiaowen Cao, Ling Zhao, Zhihao Chen, Hongbing Yuan, Mina Zhang, Wenwu Zhang","doi":"10.1117/12.2602929","DOIUrl":"https://doi.org/10.1117/12.2602929","url":null,"abstract":"Micro/nanostructure with a subwavelength period can be induced on the material surface by femtosecond laser, named as Laser Induced Periodic Surface Structure (LIPSS). The uniform LIPSS structure act as a grating that diffracts light, which can display vivid structural colors when illuminating the surface with white light. Structural color with periodic LIPSS structure has strong angle dependence, depends on the direction of the LIPSS structure, which provided us with a new method to realize multi-direction micro/nanostructure processing. By changing the femtosecond laser polarization, we can get the periodic micro/nanostructures in different directions. The polarization controllable femtosecond fabrication can be used for multi-pattern fabrication. The structural color with polarization sensitivity, different patterns could be observed in different directions. Moreover, different from other coloration methods, structural color has inherent stability, which have potential application in the fields of anti-counterfeiting, information storage and dynamic display. In this letter, we introduce a half wave plate to adjust the polarization state of the laser, and realize femtosecond laser variable polarization processing multi-pattern on a stainless steel foil.","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134410358","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