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Enhancement of Optomechanical Squeezing of Light Using the Optical Coherent Feedback

A coherent feedback scheme is used to enhance the degree of squeezing of the output field in a cavity optomechanical system. In the feedback loop, a beam splitter (BS) plays the roles of both a feedback controller and an input–output port. To realize effective enhancement, the output quadrature shou...

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Autores principales: Wu, Zhenhua, Yi, Zhen, Gu, Wenju, Sun, Lihui, Ficek, Zbigniew
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9777923/
https://www.ncbi.nlm.nih.gov/pubmed/36554146
http://dx.doi.org/10.3390/e24121741
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author Wu, Zhenhua
Yi, Zhen
Gu, Wenju
Sun, Lihui
Ficek, Zbigniew
author_facet Wu, Zhenhua
Yi, Zhen
Gu, Wenju
Sun, Lihui
Ficek, Zbigniew
author_sort Wu, Zhenhua
collection PubMed
description A coherent feedback scheme is used to enhance the degree of squeezing of the output field in a cavity optomechanical system. In the feedback loop, a beam splitter (BS) plays the roles of both a feedback controller and an input–output port. To realize effective enhancement, the output quadrature should take the same form as the input quadrature, and the system should operate at the deamplification situation in the meantime. This can be realized by choosing an appropriate frequency-dependent phase angle for the generalized quadrature. Additionally, both the transmissivity of the BS and the phase factor induced by time delays in the loop affect optical squeezing. For the fixed frequency, the optimal values of transmissivity and phase factor can be used to achieve the enhanced optical squeezing. The effect of optical losses on squeezing is also discussed. Optical squeezing is degraded by the introduced vacuum noise owing to the inefficient transmission in the loop. We show that the enhancement of squeezing is achievable with the parameters of the current experiments.
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spelling pubmed-97779232022-12-23 Enhancement of Optomechanical Squeezing of Light Using the Optical Coherent Feedback Wu, Zhenhua Yi, Zhen Gu, Wenju Sun, Lihui Ficek, Zbigniew Entropy (Basel) Article A coherent feedback scheme is used to enhance the degree of squeezing of the output field in a cavity optomechanical system. In the feedback loop, a beam splitter (BS) plays the roles of both a feedback controller and an input–output port. To realize effective enhancement, the output quadrature should take the same form as the input quadrature, and the system should operate at the deamplification situation in the meantime. This can be realized by choosing an appropriate frequency-dependent phase angle for the generalized quadrature. Additionally, both the transmissivity of the BS and the phase factor induced by time delays in the loop affect optical squeezing. For the fixed frequency, the optimal values of transmissivity and phase factor can be used to achieve the enhanced optical squeezing. The effect of optical losses on squeezing is also discussed. Optical squeezing is degraded by the introduced vacuum noise owing to the inefficient transmission in the loop. We show that the enhancement of squeezing is achievable with the parameters of the current experiments. MDPI 2022-11-29 /pmc/articles/PMC9777923/ /pubmed/36554146 http://dx.doi.org/10.3390/e24121741 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wu, Zhenhua
Yi, Zhen
Gu, Wenju
Sun, Lihui
Ficek, Zbigniew
Enhancement of Optomechanical Squeezing of Light Using the Optical Coherent Feedback
title Enhancement of Optomechanical Squeezing of Light Using the Optical Coherent Feedback
title_full Enhancement of Optomechanical Squeezing of Light Using the Optical Coherent Feedback
title_fullStr Enhancement of Optomechanical Squeezing of Light Using the Optical Coherent Feedback
title_full_unstemmed Enhancement of Optomechanical Squeezing of Light Using the Optical Coherent Feedback
title_short Enhancement of Optomechanical Squeezing of Light Using the Optical Coherent Feedback
title_sort enhancement of optomechanical squeezing of light using the optical coherent feedback
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9777923/
https://www.ncbi.nlm.nih.gov/pubmed/36554146
http://dx.doi.org/10.3390/e24121741
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