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  • Received: Apr. 15, 2020

    Accepted: Jul. 8, 2020

    Posted: Oct. 27, 2020

    Published Online: Oct. 27, 2020

    The Author Email: Xiaoyang Guo (guoxiaoyang@sztu.edu.cn), Cangtao Zhou (zhoucangtao@sztu.edu.cn), Shuangchen Ruan (ruanshuangchen@sztu.edu.cn)

    DOI: 10.1017/hpl.2020.26

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    Huijun He, Jun Yu, Wentao Zhu, Xiaoyang Guo, Cangtao Zhou, Shuangchen Ruan. A Yb:KGW dual-crystal regenerative amplifier[J]. High Power Laser Science and Engineering, 2020, 8(4): 04000e35

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High Power Laser Science and Engineering, Vol. 8, Issue 4, 04000e35 (2020)

A Yb:KGW dual-crystal regenerative amplifier

Huijun He1,2, Jun Yu1, Wentao Zhu1, Xiaoyang Guo1,*, Cangtao Zhou1,*, and Shuangchen Ruan1,2,*

Author Affiliations

  • 1Center for Advanced Material Diagnostic Technology, and College of Engineering Physics, Shenzhen Technology University, Shenzhen518118, China
  • 2College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen518060, China

Abstract

This study develops a Yb:KGW dual-crystal based regenerative amplifier. The thermal lensing and gain-narrowing effects are compensated by the dual-crystal configuration. Sub-nanojoule pulses are amplified to 1.5 mJ with 9 nm spectral bandwidth and 1 kHz repetition rate using chirped pulse amplification technology. Consequently, 1.2 mJ pulses with a pulse duration of 227 fs are obtained after compression. Thanks to the cavity design, the output laser was a near diffraction limited beam with M2 around 1.1. The amplifier has the potential to boost energy above 2 mJ after compression and act as a front end for a future kilohertz terawatt-class diode-pumped Yb:KGW laser system.

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