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

## TL;DR

This paper reports a high power, stable passively Q-switched fiber laser at 1064 nm using monolayer graphene, achieving over 80 W power and demonstrating practical stability for potential applications.

## Contribution

It introduces the first high power passively Q-switched fiber laser in the 1 μm range utilizing monolayer graphene, with notable stability and high pulse energy.

## Key findings

- Achieved over 80 W average power at 1064 nm
- First demonstration of high power passively Q-switched fiber laser in 1 μm range
- Laser operated stably over multiple days, confirming practical viability

## Abstract

We demonstrate a monolayer graphene based passively Q-switched fiber laser with three-stage amplifiers that can deliver over 80 W average power at 1064 nm. 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 passively Q-switched fiber laser in the 1 um range reported so far. More importantly, the Q-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 high power pulsed fiber lasers.

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Source: https://tomesphere.com/paper/1705.01511