非线性光机械系统中的弱力探测  

Weak force detection in a nonlinear optomechanical system

作　　者：张现周 赵雯 景辉 Zhang Xianzhou;Zhao Wen;Jing Hui(College of Physics and Materials Science,Henan Normal University,Xinxiang 453007,China;School of Physics and Electronics,Hunan Normal University,Changsha 410081,China)

机构地区：[1]河南师范大学物理与材料科学学院,河南新乡453007 [2]湖南师范大学物理与电子科学学院,长沙410081

出　　处：《河南师范大学学报（自然科学版）》2020年第2期52-58,共7页Journal of Henan Normal University(Natural Science Edition)

基　　金：国家自然科学基金(11474087,11774086)。

摘　　要：从理论上研究了包含光学参量放大器的非线性腔光机械系统的弱力探测性能.一方面,发现通过调节光学参量放大器的非线性增益以及输入光场与腔场之间的有效失谐,可以减小压缩正交中约14 dB的量子噪声,从而将弱力探测灵敏度提高2倍以上.另一方面,分析了非线性腔结合零差测量产生的反作用噪声相消现象并且实现量子非破坏测量的方法.We theoretically studied the weak force detection performance of a nonlinear cavity optomechanical system including an optical parametric amplifier.On the one hand,we found that by adjusting the nonlinear gain of the optical parametric amplifier and the effective detuning between the input light field and the cavity field,the quantum measurement noise in the squeezed quadrature can be reduced about 14 dB,thereby improving the weak force detection sensitivity.On the other hand,we analyzed the back-action noise cancellation phenomenon generated by nonlinear cavity combined with homodyne measurement and realize the method of quantum nondemolition measurement.

关 键 词：非线性光学 光机械系统 光学参量放大器 弱力探测 标准量子极限 

分 类 号：O431[机械工程—光学工程] O437[理学—光学]