Bright squeezed light generation via nonclassical power stabilization

authored by

Jasper R. Venneberg, Henning Vahlbruch, Marina Trad Nery, Benno Willke

Abstract

Low-power-noise lasers are essential for many high-precision experiments. Shot noise imposes a fundamental limit on the power stability achievable with classical light sources. In this Letter, we report the generation of bright squeezed light in the audio band, which can improve the sensitivity of otherwise shot-noise-limited measurements. The bright squeezed light source is experimentally realized via the use of squeezed vacuum in a power stabilization scheme. We demonstrate a laser beam at a power of 9.9 mW with a broadband power noise suppression below the classical stabilization limit by up to 8.7-0.4+0.3dB in the audio band, resulting in a bright squeezed beam with a power noise of 5.7-0.4+0.3dB below shot noise for frequencies from 6 kHz to 20 kHz. We further conceptually outline a method to surpass this result in the future.

Organisation(s)

Institute of Gravitation Physics
QuantumFrontiers

External Organisation(s)

Leibniz Universitätsgesellschaft

Type

Article

Journal

Physical Review Research

Volume

7

ISSN

2643-1564

Publication date

20.05.2025

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

General Physics and Astronomy

Electronic version(s)

https://doi.org/10.1103/PhysRevResearch.7.L022040 (Access: Open)