Radiation-pressure-mediated control of an optomechanical cavity
Radiation-pressure-mediated control of an optomechanical cavity
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DOI：
10.1103/physreva.97.013827
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发表时间：
2018-01-18
影响因子：
2.9
通讯作者：
Corbitt, Thomas
中科院分区：
文献类型：
--
作者：
Cripe, Jonathan;Aggarwal, Nancy;Corbitt, Thomas
我们描述并演示了一种在存在强光学弹簧的情况下使用辐射压力来控制失谐可移动镜法布里-珀罗腔的方法。在低于光学弹簧谐振的频率下，腔的自锁本质上是通过腔场与可移动端镜之间的光机械（OM）相互作用来实现的。 OM 相互作用导致镜子具有高刚性并降低对外力的敏感性。然而，由于腔内的延迟时间有限，这种增强的刚性伴随着抗阻尼力，从而使腔不稳定。通过在光学弹簧谐振周围的频带内施加外部反馈来稳定腔。使用光电探测器以传输光束的幅度正交形式感测误差信号。腔体输入路径中的幅度调制器调制光强度以提供稳定的辐射压力。
We describe and demonstrate a method to control a detuned movable-mirror Fabry-Perot cavity using radiation pressure in the presence of a strong optical spring. At frequencies below the optical spring resonance, self-locking of the cavity is achieved intrinsically by the optomechanical (OM) interaction between the cavity field and the movable end mirror. The OM interaction results in a high rigidity and reduced susceptibility of the mirror to external forces. However, due to a finite delay time in the cavity, this enhanced rigidity is accompanied by an antidamping force, which destabilizes the cavity. The cavity is stabilized by applying external feedback in a frequency band around the optical spring resonance. The error signal is sensed in the amplitude quadrature of the transmitted beam with a photodetector. An amplitude modulator in the input path to the cavity modulates the light intensity to provide the stabilizing radiation pressure force.