Frequency doubled telecom fiber laser for a cold atom interferometer using optical lattices

TL;DR

This paper presents a compact, robust laser system based on frequency-doubled telecom technology, capable of providing all necessary laser wavelengths for a rubidium cold atom interferometer with optical lattices, simplifying the setup.

Contribution

Introduction of a single, integrated laser system using frequency doubling and optical switching for cold atom interferometry applications.

Findings

Delivers 900 mW at 780 nm for optical lattice

Provides 650 mW at 780 nm for cooling and detection

Uses only one laser amplifier for all functions

Abstract

A compact and robust laser system, based on a frequency-doubled telecom laser, providing all the lasers needed for a rubidium cold atom interferometer using optical lattices is presented. Thanks to an optical switch at 1.5 \mu m and a dual-wavelength second harmonic generation system, only one laser amplifier is needed for all the laser system. Our system delivers at 780 nm a power of 900 mW with a detuning of 110 GHz for the optical lattice and a power of 650 mW with an adjustable detuning between 0 and -1 GHz for the laser cooling, the detection and the Raman transitions.