Laser ceramic materials for subpicosecond solid-state lasers using Nd -doped mixed scandium garnets

Nd添加複合型スカンジウムガーネットを用いたサブピコ秒固体レーザーセラミックス媒質の開発

岡田 大; 田中 桃子; 桐山 博光; 中井 善基*; 越智 義浩; 杉山 僚; 大道 博行; 木村 豊秋*; 柳谷 高公*; 八木 秀喜*; 明珍 憲幸*

Okada, Hajime; Tanaka, Momoko; Kiriyama, Hiromitsu; Nakai, Yoshiki*; Ochi, Yoshihiro; Sugiyama, Akira; Daido, Hiroyuki; Kimura, Toyoaki*; Yanagitani, Takagimi*; Yagi, Hideki*; Meichin, Noriyuki*

We have successfully developed and demonstrated broadband emission Nd-doped mixed scandium garnets based on laser ceramic technology. The inhomogeneous broadening of Nd fluorescence lines results in a bandwidth above 5 nm that is significantly broader than that for Nd:YAG and enables subpicosecond mode-locked pulse durations. We have also found the emission cross-section of 7.810 cm to be adequate for efficient energy extraction and thermal conductivity of 4.7 W/mK from these new Nd-doped laser ceramics. The new laser ceramics are good candidates for laser host material in diode-pumped subpicosecond laser system with high efficiency and high repetition rate.