High-power, high-efficiency single-frequency DBR fiber laser at 1064 nm based on Yb<sup>3+</sup>-doped silica fiber
Yanyan Li, Xun Deng, Shijie Fu, Quan Sheng, Chaodu Shi, Junxiang Zhang, Lu Zhang, Wei Shi, Jianquan Yao
Abstract
A high-power, high-efficiency single-frequency fiber laser at 1064 nm was demonstrated based on a distributed Bragg reflector (DBR) all-silica-fiber configuration. A single-frequency laser with an output power of 642 mW and slope efficiency of 66.4% with respect to absorbed pump power was achieved from a 1.2-cm-long commercially available Yb 3+ -doped silica fiber. To the best of our knowledge, this is the highest single-frequency laser power and efficiency obtained from the DBR all-silica fiber laser. The work presented here paves the way for the development of high-power, robust, and cost-effective single-frequency Yb 3+ -doped all-silica fiber lasers.