CAJ | 학술논문

平衡零拍探测是测量量子光场的重要方法之一.通过对相位灵敏光学参量放大器注入的信号进行位相调制,然后利用平衡零拍探测系统测量光学参量放大器输出的压缩光.将相位灵敏光学参量分别运转在参量放大和参量缩小,通过观察噪声谱中的调制信号就可确定测量的量子光场是正交振幅或位相分量.通过解调位相调制信号可获得误差信号,实现锁定平衡零拍探测系统本底光与待测光场相对位相为零(对应于待测光场振幅噪声分量).
평형령박탐측시측량양자광장적중요방법지일.통과대상위령민광학삼량방대기주입적신호진행위상조제,연후이용평형령박탐측계통측량광학삼량방대기수출적압축광.장상위령민광학삼량분별운전재삼량방대화삼량축소,통과관찰조성보중적조제신호취가학정측량적양자광장시정교진폭혹위상분량.통과해조위상조제신호가획득오차신호,실현쇄정평형령박탐측계통본저광여대측광장상대위상위령(대응우대측광장진폭조성분량).
@@@@The balanced homodyne detection technique is an important method to detect the quantum light field. The signal light injected into the phase sensitive optical parameter amplifier (OPA) is phase modulated. The output squeezed light of OPA is detected by the balanced homodyne detection system. When the phase sensitive OPA is operated at parametric amplification and deamplification respectively, we can judge which quadrature component of the quantum light field is measured by observing the modulation signal. We can demodulate the phase modulation signal to achieve the error signal, which is used to lock the relative phase of zero between the local and the quantum light fields (corresponding to the quadrature-amplitude of the unknown light field).