The rising power of random fiber laser

Abstract

We report on the demonstration of a 418 W high power random fiber laser, which is the highest power to the best of our knowledge. The random laser is a half-open cavity based on 130 meters long passive fiber with core diameter of 20 μm. It is pumped by 1070 nm Yb-doped fiber laser. The central wavelength of 1st order random laser is 1120 nm. The output power, spectral, and temporal characters are carefully discussed. The results show that such cavity can export random laser effectively. The presented work provides an impactful method to advance the output power of random fiber laser.