Parametric frequency fusion by inverse four-wave mixing

TL;DR

This paper reports the first experimental observation of inverse four-wave mixing, a new parametric process in optical fibers where frequency-degenerate waves are generated by mixing two different pump frequencies.

Contribution

It provides the first experimental evidence of inverse four-wave mixing, expanding the understanding of nonlinear optical processes in birefringent fibers.

Findings

Observation of frequency-degenerate waves generated by inverse four-wave mixing

Experimental validation of a new nonlinear optical process

Demonstration in birefringent optical fiber

Abstract

This work reports the experimental observation of a new type of four-wave mixing in which frequency-degenerate weak signal and idler waves are generated by mixing two pump waves of different frequencies in a normally dispersive birefringent optical fiber. This parametric frequency fusion is what we believed the first experimental evidence of inverse four-wave mixing.