Properties of 1.5 um synchronous heralded single photon sources based on optical fiber

TL;DR

This paper demonstrates a fiber-based 1.5 um synchronous heralded single photon source with high efficiency and low multi-photon probability, showing promise for quantum information applications.

Contribution

The paper presents the first experimental realization of a fiber-based synchronous HSPS at 1.5 um with high efficiency and low g2(0), highlighting its potential for quantum technologies.

Findings

Achieved >60% preparation efficiency

g2(0)<0.06 indicating low multi-photon probability

Multi-photon probability reduced by over 16 times compared to Poissonian sources

Abstract

A 1.5 um synchronous heralded single photon source (HSPS) is experimentally demonstrated based on dispersion shifted fiber and commercial fiber components in the paper. Experimental results show that both the preparation efficiency and the conditional second order correlation function g2(0) increase with the pump light level. Between the two important parameters, tradeoff should be taken in order to obtain a high quality fiber-based synchronous HSPS. A synchronous HSPS with a prepare efficiency of >60% and g2(0)<0.06 is achieved, the multi-photon probability of which is reduced by a factor of more than 16 compared with the Poissonian light sources. The experimental results show a great potential of the fiber-based synchronous HSPS for quantum information applications.