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Highly efficient difference-frequency generation for mid-infrared pulses by passively synchronous seeding
High Power Laser Science and Engineering ( IF 4.8 ) Pub Date : 2021-01-13 , DOI: 10.1017/hpl.2020.50
Kun Huang , Yinqi Wang , Jianan Fang , Huaixi Chen , Minghang Xu , Qiang Hao , Ming Yan , Heping Zeng

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.

中文翻译:

通过被动同步播种实现中红外脉冲的高效差频生成

我们已经提出并通过实验证明了一种基于被动同步光纤激光器的高效中红外差频产生的新方案。在非线性转换过程中采用重合种子脉冲可以大大降低中红外参数发射的泵浦阈值。因此,制备了瓦级平均功率的3.1 μm皮秒中红外光源,从泵浦光到下变频光的功率转换效率最高可达77%。此外,发电量的长期稳定性表现在1小时内相对波动低至0.17%。由于采用全光无源同步和全保偏光纤架构,所实现的激光系统还具有简单、紧凑和坚固的特点,
更新日期:2021-01-13
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