Rubidium resonant squeezed light from a diode-pumped optical-parametric oscillator

TL;DR

This paper presents a diode-laser-pumped system that generates rubidium resonant quadrature and polarization squeezing, overcoming diode laser phase noise for quantum memory applications.

Contribution

It introduces a novel stabilization method enabling diode lasers to produce high-quality squeezed light resonant with rubidium atoms.

Findings

Successful generation of rubidium D1 resonant squeezed light

Effective suppression of diode laser phase noise

Potential for quantum memory integration

Abstract

We demonstrate a diode-laser-pumped system for generation of quadrature squeezing and polarization squeezing. Due to their excess phase noise, diode lasers are challenging to use in phase-sensitive quantum optics experiments such as quadrature squeezing. The system we present overcomes the phase noise of the diode laser through a combination of active stabilization and appropriate delays in the local oscillator beam. The generated light is resonant to the rubidium D1 transition at 795nm and thus can be readily used for quantum memory experiments.