Quantum detection systems for quantum communications

量子通信是一个快速发展的领域，目前正在展示应用程序，以允许各方之间的不可破解的通信。量子光学是通过使用硅光子代工厂设计电路来操纵光子进行量子信息实验来缩放的。目前工程的一个全封闭的量子探测系统，集中资源到一个中心点为最终用户。在这篇论文中，我们描述了一个量子通信网络的开端，利用高维纠缠分布的光子通过多芯光纤。激励超导纳米线单光子探测器（SNSPD）集线器包含许多探测器和使用FPGA系统的时间标记，用于允许封闭的低温站系统。然后，我们最后解决的SNSPD的检测效率的提高建模的环形腔检测器，优化短波红外波长，解决实用性使用多模交叉，以尽量减少损失。

Quantum communications is a fast-growing fields with applications currently being demonstrated, to allow for un hackable communications between parties. Quantum optics is scaled by using Si photonics foundries to design circuits to manipulate photons to perform quantum information experiments. Currently engineering of a fully enclosed quantum detection system to concentrate resources into a central point for the end user. In this thesis we describe a quantum communication network inception using high dimensional entanglement distribution of photons via multicore fibre. Motivating a superconducting nanowire single photon detector (SNSPD) hub containing many detectors and the time tagging using an FPGA system used to allow for an enclosed cryogenic station system. We then finally address the improvement of detection efficiency of SNSPDs by modelling a ring cavity detector, optimised for short wave infrared wavelengths, addressing practicalities using a multi-mode crosser to minimise losses.