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http://dx.doi.org/10.3807/COPP.2021.5.3.306

200-W Continuous-wave Thulium-doped All-fiber Laser at 2050 nm  

Shin, Jae Sung (Korea Atomic Energy Research Institute)
Cha, Yong-Ho (Korea Atomic Energy Research Institute)
Chun, Byung Jae (Korea Atomic Energy Research Institute)
Jeong, Do-Young (Korea Atomic Energy Research Institute)
Park, Hyunmin (Korea Atomic Energy Research Institute)
Publication Information
Current Optics and Photonics / v.5, no.3, 2021 , pp. 306-310 More about this Journal
Abstract
A 200-W continuous-wave thulium-doped all-fiber laser at 2050 nm was developed with a master oscillator power amplifier configuration. For the master oscillator, a single-mode thulium-doped fiber laser was built with fiber Bragg gratings. The operating power of the oscillator was 10.1 W at a pump power of 20.9 W, and the slope efficiency was measured to be 53.0%. All emitted wavelengths of the oscillator were located between 2049.2 nm and 2049.9 nm, and no other peaks in different wavelength ranges were observed. The maximum output power of the final amplified beam was 204.6 W at a pump power of 350.4 W. The slope efficiency of the amplifier was measured to be 58.4%.
Keywords
Fiber laser; High-power laser; Thulium laser;
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