Open AccessContrast ratio of femtosecond ultraintense Ti:sapphire laser with multi-pass amplifier
Author(s) -
Weichang Li,
Zhaohua Wang,
Cheng Liu,
Hao Teng,
Zhiyi Wei
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.124210
Subject(s) - femtosecond , sapphire , laser , materials science , amplifier , optics , chirped pulse amplification , ti:sapphire laser , preamplifier , femtosecond pulse shaping , pulse (music) , contrast ratio , optoelectronics , ultrafast laser spectroscopy , physics , cmos , detector
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.