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High average power 200 fs mid-infrared KTP optical parametric oscillator tunable from 2.61 to 3.84 μm

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Abstract

We report a broadly tunable mid-infrared femtosecond KTiOPO4 optical parametric oscillator (OPO) pumped by a mode-locked Yb:KGW oscillator. Under pump power of 7 W, up to 2.05 W average power was generated in the 1.41–1.71 μm region at a repetition rate of 151 MHz, corresponding to a pump-to-signal conversion efficiency of 29.3%. After compensating the intracavity dispersion, the pulse width of the signal wave was measured to be 200 fs at 1.6 μm, close to the transform-limited pulse duration. For the idler pulse, during the tuning range from 2.61 to 3.84 μm, the average powers were greater than 1 W, with a passive stability better than 0.7% rms during 3 h.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (11774410, 91850209, 61905287, 61705174); Strategic Priority Research Program of CAS (XDB16030200).

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Authors and Affiliations

  1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China

    Xianghao Meng, Zhaohua Wang, Jiajun Song, Xianzhi Wang & Zhiyi Wei

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Xianghao Meng, Zhaohua Wang, Jiajun Song, Xianzhi Wang & Zhiyi Wei

  3. Songshan Lake Materials Laboratory, Dongguan, 523808, China

    Zhiyi Wei

  4. CAS Center for Excellence in Ultra-Intense Laser Science, Shanghai, 201800, China

    Zhaohua Wang

  5. School of Physics and Optoelectronic Engineering, Xidian University, Xi’an, 710071, China

    Wenlong Tian & Jiangfeng Zhu

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  1. Xianghao Meng
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Meng, X., Wang, Z., Tian, W. et al. High average power 200 fs mid-infrared KTP optical parametric oscillator tunable from 2.61 to 3.84 μm. Appl. Phys. B 127, 129 (2021). https://doi.org/10.1007/s00340-021-07675-w

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