Characterization of a Quantum Light Source Based on Spontaneous Parametric Down-Conversion

TL;DR

This paper reports the development and detailed characterization of a high-brightness quantum light source based on spontaneous parametric down-conversion, capable of generating various quantum states with high detection rates.

Contribution

The work introduces a novel, bright quantum light source with comprehensive characterization, including two-photon interference measurements, advancing quantum optics technology.

Findings

Single-photon detection rate of 800,000 per second

Successful generation of entangled quantum states

Observation of two-photon quantum interference

Abstract

We have built a quantum light source capable of producing different types of quantum states. The quantum light source is based on entangled state preparation in the process of spontaneous parametric down-conversion. The single-photon detection rate of eight-hundred thousand per second demonstrates that we have created a bright state-of-the-art quantum light source. As a part of the characterization we measured two-photon quantum interference in a Hong-Ou-Mandel interferometer.