6 W, 1 kHz linewidth, tunable continuous-wave near-infrared laser

TL;DR

This paper reports a high-power, narrow-linewidth, tunable continuous-wave near-infrared laser based on a modified titanium sapphire laser, achieving sub-kHz linewidth and significant power stability for various wavelength ranges.

Contribution

It introduces a modified titanium sapphire laser system with injection locking, amplitude control, and frequency stabilization, enabling high power, narrow linewidth, and tunability from 700 to 1000 nm.

Findings

6-6.5 W output power at 852 nm

<1 kHz linewidth after stabilization

Tunable from 700 to 1000 nm

Abstract

A modified Coherent 899-21 titanium sapphire laser is injection locked to produce 6-6.5 W of single-frequency light at 852 nm. After closed-loop amplitude control and frequency stabilization to a high-finesse cavity, it delivers 4-4.5 W with <1 kHz linewidth at the output of a single-mode fiber. The laser is tunable from about 700-1000 nm; up to 8 W should be possible at 750-810 nm.