CMOS-compatible, multiplexed source of heralded photon pairs: towards integrated quantum combs

TL;DR

This paper presents a CMOS-compatible integrated photon pair source using a microring resonator that generates multiple independent photon pairs across a frequency comb suitable for quantum communication, with robustness and low power operation.

Contribution

It introduces a novel integrated photon pair source that is CMOS-compatible, multiplexed, and operates without active stabilization, advancing integrated quantum photonics.

Findings

Generates multiple photon pairs at different wavelengths in a frequency comb.

Compatible with fiber communication channels and quantum memories.

Operates robustly at low power levels.

Abstract

We report an integrated photon pair source based on a CMOS-compatible microring resonator that generates multiple, simultaneous, and independent photon pairs at different wavelengths in a frequency comb compatible with fiber communication wavelength division multiplexing channels (200 GHz channel separation) and with a linewidth that is compatible with quantum memories (110 MHz). It operates in a self-locked pump configuration, avoiding the need for active stabilization, making it extremely robust even at very low power levels.