# Resource-efficient fibre-integrated temporal multiplexing of heralded single photons

## TL;DR

This paper introduces a resource-efficient, fibre-integrated temporal multiplexing system for heralded single photons, enhancing photon delivery probability while maintaining a robust, alignment-free platform.

## Contribution

It demonstrates a novel multiplexed single photon source using a fibre delay loop and a single switch, reducing resource overhead compared to previous methods.

## Key findings

- Enhanced single-photon delivery probability through multiplexing
- Resource-efficient fibre-integrated design
- Robust, alignment-free platform

## Abstract

We present a multiplexed single photon source that re-synchronises heralded single photons generated by four-wave mixing in photonic crystal fibre using a fibre delay loop controlled by a single switch. By combining the probabilities of generating heralded single photons on four consecutive pump pulses we obtain an enhancement of the per-bin single-photon delivery probability. Our source demonstrates a way in which single-photon source multiplexing may be carried out with minimised resource overhead while retaining the benefits of a robust and alignment-free platform.