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http://dx.doi.org/10.3807/KJOP.2021.32.5.209

High-power Operation of a Yb Fiber Laser at 1018 nm  

Oh, Ye Jin (Department of Photonics and Nanoelectronics, Hanyang University ERICA)
Park, Hye Mi (Department of Photonics and Nanoelectronics, Hanyang University ERICA)
Park, Jong Seon (Department of Photonics and Nanoelectronics, Hanyang University ERICA)
Park, Eun Ji (Department of Applied Physics, Hanyang University ERICA)
Kim, Jin Phil (Department of Photonics and Nanoelectronics, Hanyang University ERICA)
Jeong, Hoon (Research Institute of Clean Manufacturing Systems, Korea Institute of Industrial Technology)
Kim, Ji Won (Department of Photonics and Nanoelectronics, Hanyang University ERICA)
Kim, Tae Hyoung (Laser Research and Development Team, LIG Nex1)
Jeong, Seong Mook (Laser Research and Development Team, LIG Nex1)
Kim, Ki Hyuck (Laser Research and Development Team, LIG Nex1)
Yang, Hwan Seok (Laser Research and Development Team, LIG Nex1)
Publication Information
Korean Journal of Optics and Photonics / v.32, no.5, 2021 , pp. 209-214 More about this Journal
Abstract
High-power continuous-wave operation of a Yb-doped double-clad fiber laser at 1018 nm, pumped by high-power diode lasers at 976 nm, is reported. Based on numerical calculation of the gain and laser signal power along the length of the Yb fiber, it is found that robust operation at 1018 nm can be achieved for a high Yb3+-ion excitation density greater than 11.5%, accompanied by high suppression of the feedback from the fiber's end facet. The Yb fiber laser constructed in house yields 626 W of continuous-wave output at 1018 nm for 729 W of incident pump power, corresponding to a slope efficiency of 86.6%. The prospect for power scaling is considered.
Keywords
Fiber lasers; Infrared lasers; Tandem-pumped lasers; Ytterbium-doped lasers;
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