Phase-locking of two self-seeded tapered amplifier lasers

TL;DR

This paper demonstrates phase-locking of two compact self-seeded tapered amplifier lasers with ultra-narrow linewidths, highlighting their potential for coherent applications like atom interferometry.

Contribution

It introduces a novel phase-locking technique for self-seeded tapered amplifier lasers achieving sub-200 kHz linewidths and characterizes their phase noise performance.

Findings

Linewidth below 200 kHz achieved

Successful phase-locking demonstrated

Potential for coherent beam-splitting in atom interferometers

Abstract

We report on the phase-locking of two diode lasers based on self-seeded tapered amplifiers. In these lasers, a reduction of linewidth is achieved using narrow-band high-transmission interference filters for frequency selection. The lasers combine a compact design with a Lorentzian linewidth below 200 kHz at an output power of 300 mW. We characterize the phase noise of the phase-locked laser system and study its potential for coherent beam-splitting in atom interferometers.