1 School of Physics and Optoelectronic Engineering, Xidian University, Xi'an 710071, China; 2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; 3 University of Chinese Academy of Sciences(CAS), Beijing 100049, China; 4 Songshan Lake Materials Laboratory, Dongguan 523808, China; 5 CAS Center for Excellence in Ultra-intense Laser Science, Shanghai 201800, China
Abstract We report on an idler-resonant femtosecond optical parametrical oscillator (OPO) based on BiB3O6 (BiBO) crystal, synchronously pumped by a frequency-doubled, mode-locked Yb:KGW laser at 515 nm. The idler wavelengths of OPO can be tuned from 1100 nm to 1540 nm. At a repetition rate of 75.5 MHz, the OPO generates as much as 400 mW of idler power with 3.1 W of pump power, the corresponding pulse duration is 80 fs, which is 1.04 times of Fourier transform-limited (FTL) pulse duration at 1305 nm. In addition, the OPO exhibits excellent beam quality with M2 < 1.8 at 1150 nm. To the best of our knowledge, this is the first idler-resonant femtosecond OPO pumped by 515 nm.
Fund: Project supported by Key-Area Research and Development Program of Guangdong Province, China (Grant No. 2018B090904003), the National Natural Science Foundation of China (Grant Nos. 11774410 and 91850209), and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB16030200).
Jinfang Yang(杨金芳), Zhaohua Wang(王兆华), Jiajun Song(宋贾俊), Renchong Lv(吕仁冲), Xianzhi Wang(王羡之), Jiangfeng Zhu(朱江峰), and Zhiyi Wei(魏志义) A 515-nm laser-pumped idler-resonant femtosecond BiB3O6 optical parametric oscillator 2022 Chin. Phys. B 31 014213
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