a State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
b Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
c Zhangjiang Laboratory, Shanghai 201210, China
Shanghai Municipal Science and Technology Major Project (2017SHZDZX02)
Natural Science Foundation of Shanghai (20ZR1464600)
This work is funded by the National Key R&D Program of China (2017YFE0123700)
Program of Shanghai Academic/Technology Research Leader (18XD1404200)
and International Partnership Program of Chinese Academy of Sciences (181231KYSB20200040).
Shanghai Sailing Program (19YF1453100)
National Natural Science Foundation of China (61925507)
Youth Innovation Promotion Association of the Chinese Academy of Sciences
The Strategic Priority Research Program of the Chinese Academy of Sciences (XDB1603)
Here, we report the recent progress on the front end developed for the 100 PW-class laser facility. Using 3 stages of optical parametric chirped-pulse amplification (OPCPA) based on lithium triborate (LBO) crystals, we realized a 5.26 J/0.1 Hz amplified output with a bandwidth over 200 nm near the center wavelength of 925 nm. After the compressor, we obtained a pulse duration of 13.4 fs. As the compression efficiency reached 67%, this OPCPA front end could potentially support a peak power of 263 TW at a repetition rate of 0.1 Hz. To the best of our knowledge, among all the 100 TW-level OPCPA systems, it shows the widest spectral width, the shortest pulse duration, and it is also the first OPCPA system working at a repetition-rate mode.