[20a-B204-1~9] 3.4 Laser system and materials (formerly 3.5)

11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)

[20a-B204-9] Output Power Enhancement of Solar-Pumped Fiber Laser using a Solid-State Sensitizer

〇(M2C)Kohei Yamamoto¹, Koichiro Nakatani², Ryota Tomizawa², Taizo Masuda^2,3, Stephan Dottermusch⁴, Ian A. Howard⁴, Bryce S. Richards⁴, Masamori Endo¹ (1.Tokai Univ., 2.Toyota Motor, 3.Univ. Electro-Commun., 4.Karlsruhe Inst. Tech.)

Keywords:

solar pumped laser,LSC,concentration free

We have proposed a solar-pumped laser that does not require any focusing devices. This is achieved by combining an Nd³⁺ active fiber with a fluorescent solar collector (LSC). The liquid dye solution in the previous device has been replaced by a solid-state dye, and the dual confinement scheme using total internal reflection at the LSC surface and the dielectric multilayer mirrors have been employed. The experiment was performed under natural sunlight. We achieved a maximum output power of 15 mW, an optical-to-optical conversion efficiency of 0.023%, and a collection efficiency of 0.21 W/m². This was a twelvefold improvement over the previous record.