Harmonically pump a femtosecond optical parametric oscillator to 1.13 GHz by a femtosecond 515 nm laser |
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Authors: | Jiajun Song Xianghao Meng Zhaohua Wang Xianzhi Wang Wenlong Tian Jiangfeng Zhu Shaobo Fang Hao Teng Zhiyi Wei |
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Affiliation: | (Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Songshan Lake Materials Laboratory,Dongguan 523808,China;School of Physics and Optoelectronic Engineering,Xidian University,Xi’an 710071,China) |
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Abstract: | We demonstrate a harmonically pumped femtosecond optical parametric oscillator(OPO) laser using a frequency-doubled mode-locked Yb:KGW laser at a repetition rate of 75.5 MHz as the pump laser. Based on a bismuth borate nonlinear crystal, repetition rates up to 1.13 GHz are realized, which is 15 times that of the pump laser. The signal wavelength is tunable from 700 nm to 887 nm. The maximum power of the signal is 207 m W at the central wavelength of 750 nm and the shortest pulse duration is 117 fs at 780 nm. The beam quality(M~2 factor) in the horizontal and vertical directions of the output beam are 1.077 and 1.141, respectively. |
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