Optics Communications Volume 475, 15 November 2020, 126270

Short-length CW laser of Nd3+ heavily doped single-mode silica glass fiber fabricated by zeolite method



Yu Yamasaki a , b,  Takayuki Hiraishi a , Yoshio Kagebayashi  ,Kana Fujioka c , Yasushi Fujimoto b , c

a  Ushio Inc., 1194, Sazuchi, Bessho-cho, Himeji City, Hyogo, 671-0224, Japan
b  Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino City, Chiba, 275-0016, Japan
c  Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita City, Osaka, 565-0871, Japan


 We have successfully constructed a short cavity CW laser with a length of 40 mm by using Nd3+ heavily doped single-mode silica glass fiber (Nd-SMF). The Nd-SMF core glass was fabricated by the zeolite method, and Nd2O3 density werw reached 1.25 wt.%. The maximum output power of the laser reached 19.7 mW. Its slope efficiency was 14.6% . The shortening of the laser cavity makes it possible to easily achieve a high repetition rate, several GHz or more. 


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