High average power (105 W) Fe:ZnSe laser pumped by radiation of laser diode side-pumped Er:YAG lasers-Reference-Cited by-同舟云学术

High average power (105 W) Fe:ZnSe laser pumped by radiation of laser diode side-pumped Er:YAG lasers

Published:2024-06-12 Issue:12 Volume:49 Page:3476
ISSN:0146-9592
Container-title:Optics Letters
language:en
Short-container-title:Opt. Lett.

Author:

Wu Yingchen¹²³⁴,Zhou Rui²⁴,Zhou Sikun²⁴,Ren Huaijin²⁴,Zhang Song³,Wei Xingbin²⁴,Shang Jianli²⁴,Wang Weimin²⁴,Leng Mingyang²,Dai Wenlin²,Yi Jiayu²⁴,Tang Chun²⁴,Chen Lei¹

Affiliation:

1. Nanjing University of Science and Technology

2. Institute of Applied Electronics

3. The Graduate School of China Academy of Engineering Physics

4. National Key Laboratory of Science and Technology on Advanced Laser and High Power Microwave

Abstract

A high average power re-frequency operation Fe:ZnSe laser using laser diode side-pumped free-running Er:YAG lasers as activating sources is presented. Two pieces of subsurface layer doped Fe:ZnSe polycrystal are adoptive in a reflective resonator configuration and face-cooled by liquid nitrogen. A maximal Fe:ZnSe laser power of 105 W at a wavelength of 4.1 μm is achieved upon pumping by ten home-made Er:YAG lasers with fiber coupled output working at a frequency of 250 Hz and a pulse duration of ∼420 μs. Corresponding to the maximum Fe:ZnSe laser power, the optical–optical efficiency and slope efficiency with respect to the absorbed pump power are 43% and 44% respectively. The beam quality factor M2 is measured to be 3.4. To the best of our knowledge, it is the highest output average power of an Fe:ZnSe laser reported.

Funder

National Natural Science Foundation

Military-civilian Integration Development Fund of China Academy of Engineering Physics

Publisher

Optica Publishing Group

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