Bridging Visible and Telecom Wavelengths with a Single-Mode Broadband Photon Pair Source

TL;DR

This paper introduces a novel photon pair source that efficiently connects visible and telecom wavelengths using a specially designed photonic crystal fiber, enabling pure, broadband photon generation without filtering.

Contribution

The work demonstrates a tailored solid-core photonic crystal fiber that produces spectrally decorrelated photon pairs in a single mode, simplifying quantum communication setups.

Findings

Single-mode broadband photon pairs bridging visible and telecom wavelengths

No narrowband filtering needed for pure photon state generation

Potential for improved quantum communication applications

Abstract

We present a spectrally decorrelated photon pair source bridging the visible and telecom wavelength regions. Tailored design and fabrication of a solid-core photonic crystal fiber (PCF) lead to the emission of signal and idler photons into only a single spectral and spatial mode. Thus no narrowband filtering is necessary and the heralded generation of pure photon number states in ultrafast wave packets at telecom wavelengths becomes possible.