摘要
对于同一量子压缩光场,采用正交振幅噪声和强度差噪声测量方案会得到不同的压缩度,对此进行了理论解释。在输出信号无损耗的情况下,强度差噪声和正交振幅噪声的压缩度都随着增益的增大而增大,但前者小于后者。考虑损耗时,强度差噪声的压缩度反而大于正交振幅噪声的压缩度,说明正交化的振幅噪声压缩度对损耗更加敏感。
For the same quantum squeezed field,the squeezing degree is different for the measurement schemes of amplitude-quadrature noise and intensity-difference noise,which is theoretically explained.When the output signal has no loss,the squeezing degrees of intensity-difference noise and amplitude-quadrature noise increase with the increase of gain,but the degree of the former is smaller than that of the latter.When the loss is considered,the squeezing degree of intensity-difference noise is larger than that of amplitude-quadrature noise,which indicates that the squeezing degree of amplitude-quadrature noise is more sensitive to loss.
作者
薛春玲
徐月娜
Xue Chunling;Xu Yuena(College of Information Engineering,Huanghe Science and Technology University,Zhengzhou,Henan 450063,Chin)
出处
《激光与光电子学进展》
CSCD
北大核心
2018年第7期443-450,共8页
Laser & Optoelectronics Progress
基金
河南省科技厅科技攻关项目(172102310634)
郑州市科技局科技发展计划(20150339)
关键词
量子光学
光场压缩态
四波混频
强度差压缩
正交振幅相位压缩
quantum optics
squeezed state of light field
four-wave mixing
intensity-difference squeezing
quadrature amplitude and phase squeezing
