Thermal Stress-Induced Birefringence in Borate Glass Irradiated by Femtosecond Laser Pulses  

作　　者：戴晔 余昺鲲 鲁波 邱建荣 阎晓娜 姜雄伟 朱从善 

机构地区：[1]Department of Physics, College of Sciences, Shanghai University, Shanghai 200444 [2]Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800

出　　处：《Chinese Physics Letters》2005年第10期2626-2629,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 50125208 and 60377017, and the Shanghai Leading Academic Discipline Program.

摘　　要：Thermal stress-induced birefringence in borate glass which has been irradiated by 800-nm femtosecond laser pulses is observed under cross-polarized light. Due to the high temperature and pressure formed in the focal volume, the material at the edge of the micro-modified region is compressed between the expanding region and the unheated one, then stress emerges. Raman spectroscopy is used to investigate the stress distribution in the micro-modified region and indicates the redistributions of density and refractive index by Raman peak shift. We suggest that this technique can develop waveguide polarizers and Fresnel zone plates in integrated optics.Thermal stress-induced birefringence in borate glass which has been irradiated by 800-nm femtosecond laser pulses is observed under cross-polarized light. Due to the high temperature and pressure formed in the focal volume, the material at the edge of the micro-modified region is compressed between the expanding region and the unheated one, then stress emerges. Raman spectroscopy is used to investigate the stress distribution in the micro-modified region and indicates the redistributions of density and refractive index by Raman peak shift. We suggest that this technique can develop waveguide polarizers and Fresnel zone plates in integrated optics.

关 键 词：WRITTEN WAVE-GUIDES TRANSPARENT MATERIALS FUSED-SILICA 

分 类 号：O433[机械工程—光学工程]