超短脉冲激光经透射型体Bragg光栅的时域特性  

Time-domain Properties of Ultrashort Pulse Laser Diffracted by Transmitting Volume Bragg Gratings

作　　者：邱彪[1,2,3] 张翔[1,2,3] 封建胜[1,2,3] 高帆[1,2,3] 吴尚[1,2,3] 张桂菊[1,2,3] 邹快盛[1,2,3] 袁孝[1,2,3] 

机构地区：[1]苏州大学现代光学技术研究所 [2]江苏省先进光学制造技术重点实验室 [3]教育部/江苏省现代光学技术重点实验室,江苏苏州215006

出　　处：《光子学报》2014年第12期12-16,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.91023009,61108024);国家自然科学基金委员会和中国工程物理研究院联合基金(Nos.11176021,11076021);江苏省高校自然科学研究项目(Nos.10KJA140045,09KJB140008);江苏省优势学科资助项目资助

摘　　要：利用Kogelnik耦合波理论对超短脉冲激光经透射型体Bragg光栅的时域衍射特性进行了研究,讨论了透射型体Bragg光栅的群延迟色散和光栅结构参数之间的关系,分析了群延迟色散和频谱剪切对衍射脉冲时域强度分布的影响.结果表明:当入射超短脉冲脉宽为100fs时,经透射型体Bragg光栅衍射后的脉冲展宽主要源自光栅对入射脉冲的频谱剪切,当入射超短脉冲脉宽为10fs时,衍射脉冲的展宽量不仅受频谱剪切的影响,而且与光栅的群延迟色散密切相关.The time-domain properties of ultrashort pulse laser through transmitting volume Bragg grating was studied with Kogelnik＇s coupled-wave theory. The dependence between group delay dispersion of transmitting volume Bragg grating and grating parameters was discussed. The influence of group delay dispersion and spectrum clipping on the intensity distribution of diffracted beam in time-domain was studied. The results show that the stretching of diffracted pulse is mainly from the spectrum clipping in the case of input pulse duration of 100 fs, and the strecthing is influenced by spectrum clipping and group delay dispersion at the input pulse duration of 10 fs.

关 键 词：透射型体Bragg光栅 超短脉冲激光 耦合波理论 群延迟色散 衍射光强 

分 类 号：TN253[电子电信—物理电子学]