Oscillating mode controllable Yb-doped random fiber laser

We propose and experimentally demonstrate a Yb-doped random fiber laser with a controllable oscillating mode based on injection locking technology. An external signal light is used to realize the locking of the transverse mode. By simply adjusting the injected signal light power, random fiber laser can directly oscillate at the LP₀₁ mode, hybrid mode, and LP₁₁ mode, respectively. Besides, random lasing with a low threshold and high slope efficiency can be obtained.