High Power Laser Science and Engineering, 2020, 8 (2): 02000e25, Published Online: Jun. 23, 2020   

35 W continuous-wave Ho:YAG single-crystal fiber laser Download: 595次

Author Affiliations
1 Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Str. 2a, D-12489Berlin, Germany
2 Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Str. 2a, D-12489Berlin, Germany
3 Jiangsu Key Laboratory of Advanced Laser Materials and Devices, Jiangsu Normal University, Xuzhou221116, China
4 School of Physics Science and Engineering, Institute for Advanced Study, Tongji University, Shanghai200092, China
5 Departament Química Física i Inorgànica, Física i Cristal.lografia de Materials i Nanomaterials (FiCMA-FiCNA)-EMaS, Universitat Rovira i Virgili, Campus Sescelades, E-43007Tarragona, Spain
6 Centre 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
7 State 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.

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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