Open AccessSpectral shaping of an OPCPA preamplifier for a sub-20-fs multi-PW laser
Author(s) -
Hwang Woon Lee,
Yeong Gyu Kim,
Je Yoon Yoo,
JunBo Yoon,
J. Yang,
Hanbum Lim,
Chang Hee Nam,
Jae Hee Sung,
Seong Ku Lee
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.024775
Subject(s) - preamplifier , optics , laser , pulse duration , full width at half maximum , materials science , pulse shaping , chirped pulse amplification , pulse (music) , regenerative amplification , physics , optoelectronics , optical amplifier , ultrashort pulse , amplifier , detector , cmos
We developed an OPCPA preamplifier with an actively shaped output spectrum to obtain a sub-20-fs-duration pulse for a 4-PW laser. The active spectral shaping was facilitated by controlling the temporal profile of a pump pulse in the OPCPA preamplifier. By optimizing the output spectrum of the OPCPA to compensate for the gain-depletion effect in the 4-PW laser, a final laser pulse with a broad spectrum of 101-nm in width (FWHM), resulting in a short pulse duration of 17 fs, was achieved.