[5p-C14-1~14] 3.5 Laser system and materials

[5p-C14-2] Harmonic conversion of high average power sub-nano second pulse fiber laser

〇Kouji Tsubakimoto¹, Hidetsugu Yoshida¹, Noriaki Miyanaga¹ (1.ILE, Osaka Univ.)

Keywords:Fiber Laser, Ultraviolet light, sub-nanosecond pulse

We demonstrate sub-ns pulse laser which delivers high average power green and ultraviolet (UV) light. The maximum average output power is 955 W at the fundamental wavelength, 10-MHz repetition rate, and 285-ps pulse duration. The average power of the green laser is 600 W. The UV average power is 300 W. The nonlinear crystals are longitudinally cooled by Peltier devices placed near incident and output surfaces to avoid degradation in efficiency at high input power.