摘要
尝试用光谱展宽的方法从频谱相位(而非时域相位)的角度利用变形反射镜来补偿1 kHz飞秒激光系统输出光路的频谱相位畸变,从而提高飞秒激光脉冲的时域强度衬比度,改善其光束质量。频谱相位补偿实验是在一台1 kHz掺钛蓝宝石飞秒激光系统输出光路中,针对超短脉冲光束通过传输介质后的频谱相位畸变,引入变形反射镜进行补偿。应用频谱相位干涉直接电场重构(SPIDER)方法和仪器作为测量手段,建立了一套相位测量补偿系统。实验结果表明用变形反射镜可使激光脉冲的相位畸变得到较好的补偿,脉冲的光束质量得到改善。这种方法的主要思想就是将相位补偿转换为空间的光程控制,控制简单且损耗很低,是自适应光学中具有应用前景的一种补偿方法。
The authors demonstrated the spectral phase aberration compensation of a 1 kHz Ti: sapphire femtosecond laser system using a deformable mirror by stretching the spectrum of the laser beam. The authors set up a set of measurement and compensation system using a deformable mirror and a spectral phase interferometry for direct electric-field reconstruction (SPIDER) instrument in a 1 kHz Ti: sapphire femtosecond laser. The experimental result showed that the spectral phase aberration of the laser was compensated well and the beam quality was improved. It is a simple and efficient method in adaptive optics using the deformable mirror to compensate the spectral phase aberration.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2005年第3期351-355,共5页
Acta Optica Sinica
