[20a-A37-7~11] 3.4 Laser system and materials

10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)

[20a-A37-7] Fully Planar Solar-Pumped Laser Operating without Solar Tracking

〇Masamori Endo¹, Ryota Tomizawa², Tomoya Nagano², Koji Hayashi² (1.Tokai Univ, 2.Toyota Motor Co.)

Keywords:

solar-pumped laser,fully-planar solar-pumped laser,fiber laser

We report the results on a "fully planar solar-pumped laser" that does not require light focusing and therefore does not require solar tracking. A 400-m Nd³⁺-doped fiber is affixed to a 30-cm-diameter disk, and an organic dye film is used as a sensitizer. The device is sandwiched by a dichroic mirror and a high-reflectance mirror for photon confinement, resulting in the lateral excitation of the fiber. A 34 mW of laser output is obtained with a slope efficiency of 0.1%. Additionally, the results of an experiment in which the laser output was observed for 2.5 hours without sunlight tracking are presented.