High power highly stable passively Q-switched fiber laser based on monolayer graphene

摘要

We demonstrate a monolayer graphene based passively Q-switched fiber laserwith three-stage amplifiers that can deliver over 80 W average power at 1064nm. The highest average power achieved is 84.1 W, with pulse energy of 1.67 mJ.To the best of our knowledge, this is the first time for a high power passivelyQ-switched fiber laser in the 1 um range reported so far. More importantly, theQ-switched fiber laser operates stably during a week few-hours-per-a-day tests,which proves the stability and practical application value of graphene in highpower pulsed fiber lasers.