Biphoton compression in standard optical fiber: exact numerical calculation

TL;DR

This paper investigates the numerical analysis of biphoton wavepacket compression using standard optical fiber, considering exact dispersion effects, to enable practical temporal compression of spectrally broad two-photon states.

Contribution

It provides an exact numerical method to analyze biphoton compression in optical fibers, incorporating detailed dispersion dependencies for practical implementation.

Findings

Numerical calculations confirm the feasibility of biphoton temporal compression.

Exact dispersion modeling improves understanding of wavepacket evolution.

The study paves the way for practical biphoton compression techniques.

Abstract

Generation of two-photon wavepackets, produced by spontaneous parametric down conversion in crystals with linearly chirped quasi-phase matching grating, is analyzed. Although being spectrally broad, two-photon wavepackets produced this way are not Fourier transform limited. In the paper we discuss the temporal compression of the wavepackets, exploiting the insertion of a standard optical fiber in the path of one of the two photons. The effect is analyzed by means of full numerical calculation and the exact dispersion dependencies in both the crystal and the fiber are considered. The study opens the way to the practical realization of this idea.