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Reducing temporal pedestal in a Ti:sapphire chirped-pulse amplification system by using a stretcher based on two concave mirrors

Authors :
Yuxin Leng
Xiao-Ming Lu
Jinfeng Li
Hui Zhang
Source :
Optics letters. 46(21)
Publication Year :
2021

Abstract

We demonstrate the temporal pedestal suppression in a Ti:sapphire chirped-pulse amplification laser system. The far-field spectral phase noise can be avoided by using a stretcher based on two concave mirrors in the system, reducing the intensity and the time range of the amplified pulse’s pedestal. At the amplified energy of 1.7 J, the contrast measurement showed that the pedestal intensity was at a level of about 1 0 − 10 within a 10 ps time window near the main pulse. In the proton acceleration experiment, a 10 nm thickness CH target was irradiated by the high-contrast pulse with the focused intensity of ∼ 1.4 × 1 0 20 W / c m 2 , which generated a proton beam with a cutoff energy of 16 MeV.

Details

ISSN :
15394794
Volume :
46
Issue :
21
Database :
OpenAIRE
Journal :
Optics letters
Accession number :
edsair.doi.dedup.....996141257e238184f45366fcc7b263b9