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  • Received: Apr. 7, 2020

    Accepted: May. 20, 2020

    Posted: Jun. 23, 2020

    Published Online: Jun. 23, 2020

    The Author Email: Yongguang Zhao (yongguangzhao@yeah.net)

    DOI: 10.1017/hpl.2020.25

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    Yongguang Zhao, Li Wang, Weidong Chen, Jianlei Wang, Qingsong Song, Xiaodong Xu, Ying Liu, Deyuan Shen, Jun Xu, Xavier Mateos, Pavel Loiko, Zhengping Wang, Xinguang Xu, Uwe Griebner, Valentin Petrov. 35 W continuous-wave Ho:YAG single-crystal fiber laser[J]. High Power Laser Science and Engineering, 2020, 8(2): 02000e25

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High Power Laser Science and Engineering, Vol. 8, Issue 2, 02000e25 (2020)

35 W continuous-wave Ho:YAG single-crystal fiber laser

Yongguang Zhao1,2,†, Li Wang1, Weidong Chen1, Jianlei Wang2, Qingsong Song2, Xiaodong Xu2, Ying Liu2, Deyuan Shen2, Jun Xu3, Xavier Mateos4, Pavel Loiko5, Zhengping Wang6, Xinguang Xu6, Uwe Griebner1, and Valentin Petrov1

Author Affiliations

  • 1Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Str. 2a, D-12489Berlin, Germany
  • 2Jiangsu Key Laboratory of Advanced Laser Materials and Devices, Jiangsu Normal University, Xuzhou221116, China
  • 3School of Physics Science and Engineering, Institute for Advanced Study, Tongji University, Shanghai200092, China
  • 4Departament Química Física i Inorgànica, Física i Cristal.lografia de Materials i Nanomaterials (FiCMA-FiCNA)-EMaS, Universitat Rovira i Virgili, Campus Sescelades, E-43007Tarragona, Spain
  • 5Centre de Recherche sur les Ions, les Matériaux et la Photonique (CIMAP), UMR 6252 CEA-CNRS-ENSICAEN, Université de Caen, 6 Boulevard du Maréchal Juin, 14050Caen Cedex 4, France
  • 6State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan250100, China

Abstract

We report on a high-power Ho:YAG single-crystal fiber (SCF) laser inband pumped by a high-brightness Tm-fiber laser at 1908 nm. The Ho:YAG SCF grown by the micro-pulling-down technique exhibits a propagation loss of $0.05\pm 0.005~\text{cm}^{-1}$ at $2.09~\unicode[STIX]{x03BC}\text{m}$. A continuous-wave output power of 35.2 W is achieved with a slope efficiency of 42.7%, which is to the best of our knowledge the highest power ever reported from an SCF-based laser in the 2 $\unicode[STIX]{x03BC}\text{m}$ spectral range.

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