摘要
在超快光学领域中的相干控制实验中,往往由于基频及其倍频激光脉冲波前面的位相面畸变与相位不一致性的存在而无法达到预期的实验结果.本文设计了一种诊断此畸变的实验方法,制作得一台效果显著的自动位相修正系统,成功地使用在相干控制光电流实验中.该系统利用位相畸变修复算法,根据光强与位相差的关系求出位相差的空间表面结构,由此计算压电陶瓷的调节电压与方向,使得可移动反射镜朝畸变减少的方向移动.实验结果表明该系统可实时自动地调节两光束的波前面保持平行.
In uhrafast optical coherent control, the existence of the phase distortion and phase inconsistence on fundamental frequency and its second harmonic generation laser wavefront leads to fail to achieve the desired experiment results in most cases. An experimental method in diagnosing such distortion situation was designed to make an effective auto-control system applied sucessfully in the coherent control photocurrent experiments. The retrieval algorithm was used, and the spatial sur- face structure was calculated based on the relationship between the beam intensity and phase difference, thus the voltage or direction was achieved. In this way, the mobile-mirror moves to less aberration. The mentioned experimental result proves that the system can adjust the two wavefronts being parallel automatically in real time.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第4期303-306,共4页
Journal of Infrared and Millimeter Waves
基金
国家自然科学基金(60178020
10274107)
广东省自然科学基金(011204
07001789)
广东省教育厅育苗工程(402082819)资助项目
关键词
超快光学
飞秒脉冲测量
相位控制技术
相干控制
ultrafast optics
femtosecond pulse measurements
phase control technology
coherent control
