Towards a quantum interface between telecommunication and UV wavelengths: design and classical performance

TL;DR

This paper presents a design for a quantum interface linking telecommunication and UV wavelengths using a PPKTP waveguide, demonstrating classical conversion efficiencies above 5% and 10%.

Contribution

It introduces a novel quantum interface design based on sum frequency generation for connecting telecom and UV wavelengths, with experimental efficiency characterization.

Findings

Classical conversion efficiency exceeds 5% externally.

Internal conversion efficiency exceeds 10%.

Potential for quantum communication applications.

Abstract

We propose and characterize a quantum interface between telecommunication wavelengths (1311 nm) and an Yb-dipole transition (369.5 nm) based on a second order sum frequency process in a PPKTP waveguide. An external (internal) conversion efficiency above 5% (10%) is shown using classical bright light.