Abstract

A single-frequency laser based on Yb:YAG crystal-derived silica fiber (YDSF) was demonstrated. The YDSF was fabricated by a molten-core method with a doping concentration of 4.8 wt. % for Yb2O3, whose gain coefficient and transmission loss were measured to be 1.7 dB/cm and 0.005 dB/cm, respectively. An over 110 mW stable single-frequency laser at 1064 nm was obtained based on a distributed Bragg reflector setup, showing a slope efficiency of 18.5%. The signal-to-noise ratio was 80  dB, and the frequency fluctuation was less than 20 MHz within 10 min.

© 2019 Optical Society of America

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