1xN DWDM channel selective quantum frequency conversion

TL;DR

This paper demonstrates a channel-selective quantum frequency converter with a 2.5 THz bandwidth, enabling dynamic 100-channel DWDM links for scalable quantum networks.

Contribution

It introduces a novel quantum frequency conversion device capable of active channel selection within DWDM systems, enhancing quantum network flexibility.

Findings

Achieved 2.5 THz bandwidth for quantum frequency conversion.

Enabled dynamic selection of 100 DWDM channels.

Showed potential for scalable quantum communication networks.

Abstract

Dense Wavelength Division Multiplexing (DWDM) is a key technology for realizing high-capacity and flexible quantum communication networks. In addition, to realize the emerging quantum internet, quantum frequency conversion is also essential for bridging different quantum systems over optical fiber networks. In this work, we demonstrate a channel-selective quantum frequency conversion (CS-QFC), which allows active selection of the frequency of the converted photon from multiple DWDM channels. The 2.5 THz bandwidth of our CS-QFC system shows the ability to establish a 100-ch DWDM dynamic link from a single quantum system. It promises to increase the diversity of the quantum network.