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Optical Fiber Communication Conference

Silicon-based integrated four-way spatially multiplexed multi-port single-photon source

Baojie Hou, Qishen Liang, Haoran Ma, Zichao Zhao, Fanjie Ruan, Bin Zhang, Donghui Chen, Yawen Tu, Yuehai Wang, huihui zhu, Jianyi Yang

Published Jan 1, 2026• 0 citations
Publisher

Abstract

Heralded single-photon sources represent a key enabling solution for enhancing the single-photon generation probability. This work introduces an innovative combinatorial distribution multiplexing scheme for the simultaneous creation of multi-port single photons with high probability.
DOI
10.1364/ofc.2026.w4k.2

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Abstract : Single photons sources are desired for many potential quantum information applications. One common method to produce single photons is based on a heralding protocol, which involves generating a pair of photons in an optical nonlinear medium and then detecting one photon in the pair to announce the existence of the other photon of the pair. Compared to other schemes, such a method offers several significant advantages. A major challenge to overcome which is inherent to this method, however, is that the photon pairs are created stochastically in the optical nonlinear medium. Thus, in order to ensure high purity levels for the single photons generated via heralding, sources of this type must be operated at low photon-pair production rates in order to keep the probability for simultaneous creation of multiple photon-pairs to an acceptably low level. A direct result of this restriction is a low heralding rate of single photons. A potential solution for achieving high-rate, high-purity, single-photon generation combines several heralding single-photon sources which are actively multiplexed to act as one source. The overall goal of this project is to develop methods to perform such multiplexing based on the use of a low loss high speed fiber optical switch.