26 February 2018 Solar-pumped fiber laser with transverse-excitation geometry
Author Affiliations +
Proceedings Volume 10512, Fiber Lasers XV: Technology and Systems; 105121J (2018) https://doi.org/10.1117/12.2288940
Event: SPIE LASE, 2018, San Francisco, California, United States
Abstract
In this paper, we demonstrate an extremely low-concentrated solar-pumped laser (SPL) that uses a transversely excited fiber laser geometry. To eliminate the need for precise solar tracking with an aggressive cooling system and to considerably increase the number of laser applications, low-concentration factors in SPLs are highly desired. We investigate the intrinsic low-loss property of SiO2 optical fibers; this property can be used to compensate for the extremely low gain coefficient of the weakly-pumped active medium by sunlight. As part of the experimental setup, a 40-m long Nd3+-doped SiO2 fiber coil was packed in a ring-shaped chamber filled with a sensitizer solution; this solution functioned as a down-shifter. The dichroic top window of the chamber transmitted a wide range of sunlight and reflected the down-shifted photons, confining them to the highly-reflective chamber until they were absorbed by the Nd3+ ions in the active fiber. We demonstrated a lasing threshold that is 10 times the concentration of natural sunlight and two orders of magnitude smaller than that of conventional SPLs.
Conference Presentation
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Taizo Masuda, Taizo Masuda, Mitsuhiro Iyoda, Mitsuhiro Iyoda, Yuta Yasumatu, Yuta Yasumatu, Tomohiro Yamashita, Tomohiro Yamashita, Kiyoto Sasaki, Kiyoto Sasaki, Masamori Endo, Masamori Endo, } "Solar-pumped fiber laser with transverse-excitation geometry", Proc. SPIE 10512, Fiber Lasers XV: Technology and Systems, 105121J (26 February 2018); doi: 10.1117/12.2288940; https://doi.org/10.1117/12.2288940
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