• Chinese Optics Letters
  • Vol. 19, Issue 11, 111403 (2021)
Wei Wang1、2, Yongxi Gao1、2, Di Sun1、2, Xiao Du1、2, Jie Guo1, and Xiaoyan Liang1、3、*
Author Affiliations
  • 1State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • 3School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China
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    Abstract

    In this paper, we propose and demonstrate an adjustable-free and movable Nd:YVO4 thin disk laser based on the telecentric cat’s eye cavity. We design a V-shaped laser cavity containing two reflectors with Nd:YVO4 thin disks as the gain medium. The experimental results from the traditional plane-plane cavity, plane-telecentric cat’s eye cavity, and double telecentric cat’s eye cavity are compared. They show that plane-telecentric cat’s eye cavity laser can keep operating at the adjustable-free range of -6° to +6°, which is up to 60 times better than that of traditional plane-plane cavity. In the double telecentric cat’s eye case, the adjustable-free range is improved to -13° to +13°. Additionally, in the case of the double telecentric cat’s eye cavity, the output telecentric cat’s eye can achieve free movement within the horizontal range of ±20 mm.

    1. Introduction

    The laser diode pumped all-solid-state laser has the advantages of compact structure, high reliability, high beam quality, and high conversion efficiency, which can be used for laser ranging, lidar, laser communication, and high-energy laser weapons. The resonator is an important part of the laser oscillator. The role of the resonator is to provide positive feedback of the axial laser mode and to ensure the single mode (or a few axial modes) oscillations of the laser. In general, it is very difficult to make a laser work ideally because it is quite difficult to adjust the two end mirrors of the resonator to a completely parallel state. Besides, when the cavity mirror of the resonator is slightly disturbed, the output of the laser will fluctuate greatly, even disappear. For all conventional plane-plane, plane-concave, and concave-concave cavity lasers, these problems are inevitable. The alignment and power stability issues for the all-solid-state laser limit its applications in many fields. These problems are especially serious in low-gain lasers.

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    Wei Wang, Yongxi Gao, Di Sun, Xiao Du, Jie Guo, Xiaoyan Liang. Adjustable-free and movable Nd:YVO4 thin disk laser based on the telecentric cat’s eye cavity[J]. Chinese Optics Letters, 2021, 19(11): 111403
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    Category: Lasers, Optical Amplifiers, and Laser Optics
    Received: Apr. 6, 2021
    Accepted: Apr. 24, 2021
    Published Online: Aug. 26, 2021
    The Author Email: Xiaoyan Liang (liangxy@siom.ac.cn)