Fast-light enhancement of an optical cavity by polarization mode coupling
Fast-light enhancement of an optical cavity by polarization mode coupling
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DOI：
10.1103/physreva.89.053804
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发表时间：
2014-05-05
影响因子：
2.9
通讯作者：
Rosenberger, A. T.
中科院分区：
文献类型：
--
作者：
Smith, David D.;Chang, H.;Rosenberger, A. T.
我们提出了一种完全线性的全光学方法的腔比例因子增强，依赖于一个单一的光学腔的正交偏振模式之间的模式耦合，消除了使用原子介质产生所需的异常色散的必要性，这降低了对温度的依赖性的比例因子，并通过减少吸收和非线性效应增加信噪比。单个腔的使用导致对将存在于两个耦合腔的系统中的噪声和漂移的共模抑制。我们表明，该系统的比例因子模宽比增加以上的单位，并演示调谐的比例因子（i）直接改变偏振模耦合通过旋转的腔内半波片，和（ii）相干控制腔反射率，这是通过改变入射偏振叠加简单地实现。这些调谐方法使我们能够接近临界反常色散条件，并实现了前所未有的增强比例因子和比例因子模宽比。基于这些研究结果，我们提出了一种适应传统的光学腔陀螺仪，利用偏振模耦合，以提高陀螺仪的标度因子，并演示了如何为这种陀螺仪的标度因子增强的带宽可以有效地扩大相比，基于原子介质的快光陀螺仪。
We present an entirely linear all-optical method of cavity scale factor enhancement that relies on mode coupling between the orthogonal polarization modes of a single optical cavity, eliminating the necessity of using an atomic medium to produce the required anomalous dispersion, which decreases the dependence of the scale factor on temperature and increases signal-to-noise ratio by reducing absorption and nonlinear effects. The use of a single cavity results in common mode rejection of the noise and drift that would be present in a system of two coupled cavities. We show that the scale-factor-to-mode-width ratio is increased above unity for this system, and demonstrate tuning of the scale factor by (i) directly varying the polarization mode coupling via rotation of an intracavity half-wave plate, and (ii) coherent control of the cavity reflectance which is achieved simply by varying the incident polarization superposition. These tuning methods allow us to closely approach the critical anomalous dispersion condition and achieve unprecedented enhancements in scale factor and in the scale-factor-to-mode-width ratio. Based on these findings, we propose an adaptation of the traditional optical cavity gyroscope that takes advantage of polarization mode coupling to enhance the gyro scale factor, and demonstrate how the bandwidth of the scale factor enhancement for this gyroscope can be effectively broadened in comparison with fast-light gyroscopes based on atomic media.