[14p-P6-1~14] 3.5 Laser system and materials

[14p-P6-14] Lasing Characteristics of Solar-pumped Laser Employing Index Matched Nd/Cr-codoped YAG Composite Rod

〇Kazuo Hasegawa¹, Tadashi Ichikawa¹, Yasuhiko Takeda¹, Akio Ikesue², Hiroshi Ito², Tomoyoshi Motohiro² (1.TOYOTA CRDL inc, 2.Nagoya Univ.)

Keywords:solar-pumped laser, transparent ceremics

We proposed a composite structure rod that has the same refractive index of gain and non-gain regions. It can oscillate solar-pumped laser with fundamental mode. The slope efficiency of 25.3% was realized by excitation equal to the natural sunlight. In Nd/Cr co-doped material, we reallized laser oscillation by the excitation of the wavelength absorbed by only Cr³⁺ and estimated that energy transfer efficiency to Nd³⁺ was 71.5%.