Integrated micro-comb sources for quantum optical applications

TL;DR

This paper reviews recent advances in integrated micro-comb sources that generate energy-time entangled optical frequency combs, highlighting their potential for scalable quantum information processing and communication.

Contribution

It discusses how photonic integration and fiber-optic components enable enhanced quantum state control and new functionalities in optical frequency combs for quantum applications.

Findings

Energy-time entangled optical frequency combs have been realized.

Photonic integration improves control and scalability.

Fiber-optic components enable new functionalities.

Abstract

A key challenge for quantum science and technology is to realise large-scale, precisely controllable, practical systems for non-classical secured communications, metrology and ultimately meaningful quantum simulation and computation. Optical frequency combs represent a powerful approach towards this, since they provide a very high number of temporal and frequency modes which can result in large-scale quantum systems. The generation and control of quantum optical frequency combs will enable a unique, practical and scalable framework for quantum signal and information processing. Here, we review recent progress on the realization of energy-time entangled optical frequency combs and discuss how photonic integration and the use of fiber-optic telecommunications components can enable quantum state control with new functionalities, yielding unprecedented capability.