High-power narrowband Raman fiber laser based on random FBG

摘要

We demonstrate a random Raman fiber laser (RRFL) based on an array of 57 fiber Bragg gratings (FBGs) with length of 4 cm and random phases and amplitudes. The laser emits up to 5.7 W of narrow-band CW radiation at 1092.3 nm. The linewidth measured by self-heterodyne technique at 2W pumping amounts to about 185 kHz.