Frequency noise cancellation in optomechanical systems for ponderomotive squeezing

TL;DR

This paper demonstrates a phase and frequency noise cancellation mechanism in optomechanical systems, enabling ponderomotive squeezing at lower frequencies, which is experimentally validated using a Fabry-Pérot cavity with a micro-mechanical mirror.

Contribution

It introduces a noise cancellation mechanism based on destructive interference, allowing ponderomotive squeezing at kHz frequencies in optomechanical systems.

Findings

Successful experimental demonstration of noise cancellation in a Fabry-Pérot cavity.

Enhanced ponderomotive squeezing at lower frequencies achieved.

Potential applications in gravitational wave detection.

Abstract

Ponderomotive squeezing of the output light of an optical cavity has been recently observed in the MHz range in two different cavity optomechanical devices. Quadrature squeezing becomes particularly useful at lower spectral frequencies, for example in gravitational wave interferometers, despite being more sensitive to excess phase and frequency noise. Here we show a phase/frequency noise cancellation mechanism due to destructive interference which can facilitate the production of ponderomotive squeezing in the kHz range and we demonstrate it experimentally in an optomechanical system formed by a Fabry-P\'{e}rot cavity with a micro-mechanical mirror.