首页 | 本学科首页   官方微博 | 高级检索  
     


Enhancement of Optomechanical Squeezing of Light Using the Optical Coherent Feedback
Authors:Zhenhua Wu  Zhen Yi  Wenju Gu  Lihui Sun  Zbigniew Ficek
Affiliation:1.School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, China;2.Quantum Optics and Engineering Division, Institute of Physics, University of Zielona Góra, Szafrana 4a, 65-516 Zielona Góra, Poland
Abstract: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.
Keywords:coherent feedback   optomechanical squeezing of light   optical and mechanical losses
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号