High Power Laser Science and Engineering, 2021, 9 (1): 010000e4, Published Online: Jan. 15, 2021
Highly efficient difference-frequency generation for mid-infrared pulses by passively synchronous seeding Download: 936次
Abstract
We have proposed and experimentally demonstrated a novel scheme for efficient mid-infrared difference-frequency generation based on passively synchronized fiber lasers. The adoption of coincident seeding pulses in the nonlinear conversion process could substantially lower the pumping threshold for mid-infrared parametric emission. Consequently, a picosecond mid-infrared source at 3.1 μm was prepared with watt-level average power, and a maximum power conversion efficiency of 77% was realized from pump to down-converted light. Additionally, the long-term stability of generated power was manifested with a relative fluctuation as low as 0.17% over one hour. Thanks to the all-optical passive synchronization and all-polarization-maintaining fiber architecture, the implemented laser system was also featured with simplicity, compactness and robustness, which would favor subsequent applications beyond laboratory operation.
Kun Huang, Yinqi Wang, Jianan Fang, Huaixi Chen, Minghang Xu, Qiang Hao, Ming Yan, Heping Zeng. Highly efficient difference-frequency generation for mid-infrared pulses by passively synchronous seeding[J]. High Power Laser Science and Engineering, 2021, 9(1): 010000e4.