Development of quantum communication system in photon-frequency basis using fiber optic components

最近对安全通信的需求激增激发了人们对开发可行的量子通信协议的兴趣。在这里，它被证明，前所未有的频率自由度的光是相当适合于这个目的，而不是许多要求专业硬件实现。事实上，无处不在的光纤元件可以简单地通过引入与频率（波长）分复用的非重叠子带相关的电场干扰来方便地提供其平台。提出并实现了一种利用时域单光子干涉的量子密钥分配方案。

A recent surge in demand for secure communication has spurred interest in developing a viable quantum communication protocol. Here it is demonstrated that the unprecedented frequency degree of freedom of light is rather suited for this purpose, as opposed to the many that call for specialty hardware to implement with. In fact, ubiquitous fiber optic components conveniently can provide its platform simply by introducing interference of the electric fields associated with the otherwise non-overlapping subbands of frequency(wavelength)-division multiplexing. An alternative quantum key distribution scheme is proposed and implemented by taking advantage of single photon interference in the time domain.