摘要
A high-quality heralded single-photon source (HSPS) at 1.5 μm is experimentally demonstrated based on spontaneous four wave-mixing in a piece of dispersion-shifted fiber cooled by liquid nitrogen.To improve the up-limit of the preparation efficiency of the HSPS,commercial dense wavelength-division multiplexing components are used to reduce the loss of the filtering and splitting system between the fiber and the single-photon detectors.As a result,a preparation efficiency of 80% is realized under a g(2)(0) of 0.06 in our HSPS experimental system,which is the best performance for the fiber-based HSPS at 1.5 μm reported so far.
基金
Supported by the National Basic Research Program of China under Grant Nos 2011CBA00303 and 2010CB327606
Tsinghua University Initiative Scientific Research Program and Basic Research Foundation of Tsinghua National Laboratory for Information Science and Technology(TNList)。
