Open Access23.7-W picosecond cryogenic-Yb:YAG multipass amplifier
Author(s) -
Shigeki Tokita,
Junji Kawanaka,
Yasukazu Izawa,
Masayuki Fujita,
Toshiyuki Kawashima
Publication year - 2007
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.003955
Subject(s) - optics , materials science , picosecond , amplifier , pulse duration , beam (structure) , diode , pulse repetition frequency , laser , laser beam quality , pulse (music) , optoelectronics , laser beams , physics , detector , telecommunications , computer science , radar , cmos
A diode-pumped picosecond 8-pass amplifier with a liquid-nitrogen-cooled Yb:YAG crystal has been developed. An average output power of 23.7 W with a near-diffraction-limited beam quality (M(2) < 1.2) was obtained at a pulse repetition rate of 80 kHz and a pulse duration of 11.7 ps. Average powers above 20 W were also obtained in the 30-80 kHz repetition rate range. The pulse energy reached almost 1 mJ at the 20 kHz repetition rate.