%0 Journal Article
%T Contrast ratio of femtosecond ultraintense Ti:sapphire laser with multi-pass amplifier<br>飞秒超强激光多通预放大过程中的脉冲信噪比研究
%A Li Wei-Chang
%A Wang Zhao-Hu
%A Liu Cheng
%A Teng Hao
%A Wei Zhi-Yi
%A <br>李伟昌
%A 王兆华
%A 刘成
%A 滕浩
%A 魏志义
%J 物理学报
%D 2011
%I 
%X According to the theory of chirped pulse amplification (CPA), we analyze numerically the gain characteristic of laser pulses in multi-pass amplifier. A CPA Ti:sapphire laser with 10-pass scheme is designed and built. The experimental result shows that the contrast ratio of the femtosecond pulse is obviously enhanced by two orders from 10-5 to 10-7 under a pump flux of 1.6 J/cm2. This work demonstrates that the contrast ratio of the amplified femtosecond laser pulse could be effectively improved by multi-pass preamplifier.
%K multi-pass preamplifier
%K contrast ratio
%K femtosecond Ti:sapphire laser<br>多通预放大
%K 信噪比
%K 飞秒钛宝石激光器
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=AE5F2209B3AD91E81C05829121AE4FF4&yid=9377ED8094509821&vid=BFE7933E5EEA150D&iid=59906B3B2830C2C5&sid=7820093C2BB9AB33&eid=7820093C2BB9AB33&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=16