# Low intensity noise high-power tunable fiber-based laser around 1007 nm

## TL;DR

This paper presents a high-power, tunable, low-noise fiber laser operating from 997 nm to 1017 nm, achieving over 16 W power with excellent noise characteristics, suitable for demanding applications.

## Contribution

Development of a robust, all-fiber, single-frequency laser with wide tunability and low noise, advancing high-power laser sources in the 1000 nm spectral range.

## Key findings

- Over 16 W output power at 1017 nm
- Less than 2% ASE across the tuning range
- Signal-to-noise ratio exceeds 40dB, up to 60dB

## Abstract

We report the development of a tunable, low-noise, all-fiber, single-frequency, linearly polarized high-power master oscillator power amplifier operating over 20 nm, from 1017 nm down to 997 nm. Using Ytterbium highly-doped silica fiber with large mode area, more than 3 W of 997 nm signal was obtained with less than 2 % of ASE. These figures keep improving with operating wavelength, to reach more than 16 W and 0.03 % of ASE at 1017 nm. The optical signal to noise ratio exceeds 40dB for the worst case up to more than 60dB. In addition, relative intensity noise remains very low over the whole tuning range (-130dBc@10kHz) down to-160dBc at 10 MHz. This robust laser has a strong potential to be a new workhorse for demanding applications in this spectral range.

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Source: https://tomesphere.com/paper/1905.10223