通过单个透镜成像的光学纳米纤维的偏振控制
Polarisation control for optical nanofibres by imaging through a single lens
摘要：
我们提出了一种简单的方法来控制光的偏振态在一个单模光学纳米纤维的腰部。该方法包括完整的偏振补偿的基础上成像散射光从固有的不均匀性都在纤维表面和玻璃材料本身。与最近报道的利用彼此成45度角的两个成像系统的协议相比，我们的方法只需要一个镜头和一个摄像机。它对于具有严格几何约束的纳米纤维应用特别有用，例如在真空室内进行冷原子实验。使用具有中等数值孔径的透镜，所实现的控制的测量保真度为约98%。
英文摘要：
We present a simple method for controlling the polarisation state of light at the waist of a single-mode optical nanofibre. The method consists of complete polarisation compensation based on imaging scattered light from inherent inhomogeneities both on the fibre surface and in the glass material itself. In contrast to the recently reported protocol exploiting two imaging systems oriented at 45 degrees to each other, our method requires only one lens and a video camera. It is particularly useful for nanofibre-based applications with severe geometric constraints, such as inside vacuum chambers for experiments with cold atoms. The measured fidelity of the achieved control is about 98\% using lenses with moderate numerical apertures.
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