Configurable spatio-temporal properties in a photon-pair source based on spontaneous four wave mixing with multiple transverse modes

TL;DR

This paper investigates photon pairs generated via spontaneous four wave mixing in a birefringent fiber supporting multiple transverse modes, revealing multiple SFWM processes through spectral analysis.

Contribution

It provides both experimental and theoretical insights into how multiple transverse modes influence SFWM spectra in birefringent fibers, a novel exploration in this context.

Findings

Multiple peaks in SFWM spectra indicate various mode combinations.

Experimental and theoretical results align, confirming mode-dependent SFWM processes.

Enhanced understanding of mode effects can improve photon-pair source design.

Abstract

We present an experimental and theoretical study of photon pairs generated by spontaneous four wave mixing (SFWM), based on birefringent phasematching, in a fiber which supports more than one transverse mode. We present SFWM spectra, obtained through single-channel and coincidence photon counting, which exhibit multiple peaks shown here to be the result of multiple SFWM processes associated with different combinations of transverse modes for the pump, signal, and idler waves.