Enhancing the stimulated emission of polarization-entangled photons using passive optical components

TL;DR

This paper proposes a passive optical resonator scheme to enhance stimulated emission of polarization-entangled photons, avoiding complex active component synchronization, with theoretical analysis and experimental validation.

Contribution

It introduces a novel passive optical resonator approach to boost entangled photon emission, simplifying the process compared to active component methods.

Findings

Theoretical validation of the passive resonator scheme.

Experimental demonstration in a double-pass setup.

Enhanced stimulated emission observed.

Abstract

Bright sources of polarization-entangled photon pairs are essential components for quantum information technologies. In general, it is necessary to introduce a resonator that combines active optical components such as an electric optical modulator to enhance the stimulated emission of polarization-entangled photons. It is technically difficult to perform the time series operation to output the stimulated entangled photons in the resonator by synchronizing laser pulses. In this paper, we propose a scheme to scale up the stimulated emission of polarization-entangled photon pairs using a resonator with only passive optical components. We show the theoretical aspects of the scheme and also perform a proof-of-principle experimental demonstration of the scheme in a double-pass configuration.