Enhancement of contrast ratio in chirped pulse amplified laser system by cross-polarized wave generation | Zendy

Chengpu Liu | Zendy; Zhaohua Wang | Zendy; Weichang Li | Zendy; Feng Liu | Zendy; Wei Zhi-Yi | Zendy

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Enhancement of contrast ratio in chirped pulse amplified laser system by cross-polarized wave generation

Author(s) -

Chengpu Liu,

Zhaohua Wang,

Weichang Li,

Feng Liu,

Wei Zhi-Yi

Publication year - 2010

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.59.7036

Subject(s) - chirped pulse amplification , contrast ratio , optics , laser , nanosecond , picosecond , ultrashort pulse , pulse (music) , contrast (vision) , materials science , physics , optoelectronics , detector

This paper reports our experimental research on the laser contrast ratio enhancement in the XL-Ⅲ (eXtreme Light Ⅲ) facility with the technology of cross-polarized wave (XPW) generation. Based on the theoretical analysis of the relerant principles, we introduced an XPW filter in the facility, which was upgraded with a double chirped pulse amplification (DCPA) scheme. Under optimized system design and alignment, we measured the conversion efficiency from fundamental wave to cross-polarized wave to be higher than 10%. The pre-pulses in nanosecond scale were deeply suppressed and the contrast ratio in picosecond scale was enhanced from 10-5 to 10-7. Our results show the XPW generation provides an effective technique to improve the contrast ratio of a Chirped-pulse amplification laser system, which is a key issue in ultrahigh intensity laser-matter researches.

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