强激光与粒子束2011，Vol.23Issue(12)：3177-3182,6.DOI:10.3788/HPLPB20112312.3177
拼接光栅缝隙对激光脉冲光强分布的影响
Laser pulse pattern influenced by mosaic grating gap
摘要
Abstract
High energy efficiency and well-distributed output on the surface of the chirped pulse grating are required in the laser pulse compressor with mosaic gratings as the dispersion element. Fresnel-Kirchhoff's diffraction theory is utilized to study the light distribution on the grating surface and the far-field diffraction pattern. The variations of the light intensity on the grating surface and the maximum value of the far-field light intensity influenced by the mosaic grating gap are calculated. It is found that the light distribution is related to the width of the gap for light incidence near the Littrow angle, and the width of the gap should be limited within 0. 5 mm. When the diffraction efficiency of the gap increases, the light distribution will be more uniform and the output energy can be enhanced. Thus a method of twice holographic exposure is proposed to increase the diffraction efficiency of the gap.关键词
拼接光栅/衍射效率/啁啾脉冲放大/脉冲压缩/光栅缝隙Key words
mosaic grating/diffraction efficiency/chirped pulse amplification/ pulse compressor grating/grating gap分类
数理科学引用本文复制引用
钱国林,吴建宏,李朝明..拼接光栅缝隙对激光脉冲光强分布的影响[J].强激光与粒子束,2011,23(12):3177-3182,6.基金项目
国家自然科学基金项目(61178046,60808013) （61178046,60808013）
江苏省重点实验室开放课题(KJS0804) （KJS0804）
江苏省高校自然研究计划项目(08KJB140009) （08KJB140009）
苏州大学光学工程专业研究生创新项目(14320911) （14320911）
