Zeylikovich I, Xu M
Physics Department, Fairfield University , Fairfield, CT 06824, USA.
AIP Adv. 2016 Feb 8;6(2):025105. doi: 10.1063/1.4941832. eCollection 2016 Feb.
The phase of multiply scattered light has recently attracted considerable interest. Coherent backscattering is a striking phenomenon of multiple scattered light in which the coherence of light survives multiple scattering in a random medium and is observable in the space as an enhancement of the intensity of backscattered light within a cone around the retroreflection direction. Reciprocity also leads to enhancement of backscattering light in the space. The random medium behaves as a reciprocity mirror which robustly converts a diverging incident beam into a converging backscattering one focusing at a conjugate spot in space. Here we first analyze theoretically this coherent backscattering mirror (CBM) phenomenon and then demonstrate the capability of CBM compensating and correcting both static and dynamic phase distortions occurring along the optical path. CBM may offer novel approaches for high speed dynamic phase corrections in optical systems and find applications in sensing and navigation.
多重散射光的相位最近引起了相当大的关注。相干背散射是多重散射光的一种显著现象，其中光的相干性在随机介质中经多次散射后仍然存在，并且在空间中可观察到，表现为在逆反射方向周围的一个圆锥体内背散射光强度的增强。互易性也会导致空间中背散射光的增强。随机介质起到互易镜的作用，能稳健地将发散的入射光束转换为汇聚的背散射光束，并聚焦在空间中的共轭点上。在此，我们首先从理论上分析这种相干背散射镜（CBM）现象，然后证明CBM补偿和校正沿光路出现的静态和动态相位畸变的能力。CBM可能为光学系统中的高速动态相位校正提供新方法，并在传感和导航中得到应用。
