[19a-431B-1~6] 3.5 Laser system and materials

[19a-431B-1] Output characteristics of zero-phonon-line pumped Yb:YAG TRAM laser

〇Seiji Taniguchi¹, Haik Chosrowjan¹, Dazhi Li¹, Shinji Motokoshi¹, Masayuki Fujita¹, Yasukazu Izawa¹, Shingo Nishikata², Tomoya Morioka², Koichi Hamamoto², Hiroshi Ikebuchi², Yuichi Ohtani², Takeshi Kaneko², Hiroyuki Daigo² (1.ILT, 2.MHI)

Keywords:solid state laser, water jet cooling, zero-phonon-line excitation

We are developing a Yb: YAG TRAM laser using water collision jet cooling method and zero phonon line excitation with the goal of developing a room temperature driven high power laser. In this research, oscillation tests were conducted using a cooling device prototyped for high power output, and its output and medium characteristics were examined. As a result, a stable output up to 180 W was obtained due to the improvement of cooling performance. We also investigated the Yb density and layer thickness effect, and clarified that high output characteristics can be obtained with media of lower density and lower layer thickness.