Experimental and theoretical study of red-shifted solitonic resonant radiation in photonic crystal fibers and generation of radiation seeded Raman solitons

TL;DR

This paper investigates the formation of red-shifted solitonic resonant radiation in photonic crystal fibers through experimental and theoretical methods, revealing its independence from soliton generation and its interaction with Raman scattering.

Contribution

It provides a combined experimental and theoretical analysis of red-shifted resonant radiation and its interaction with Raman solitons in photonic crystal fibers, extending understanding of phase matching phenomena.

Findings

Radiation is generated independently of solitons.

Theoretical predictions match experimental results.

Long fiber studies show radiation-seeded Raman solitons formation.

Abstract

The red shifted solitonic resonant radiation is a fascinating phase matching phenomenon that occurs when an optical pulse, launched in the normal dispersion regime of photonic crystal fiber, radiates across the zero dispersion wavelength. The formation of such phase-matched radiation is independent of the generation of any optical soliton and mainly governed by the leading edge of input pump which forms a shock front. The radiation is generated at the anomalous dispersion regime and found to be confined both in time and frequency domain. We experimentally investigate the formation of such radiations in photonic crystal fibers with detailed theoretical analysis. Our theoretical predictions corroborate well with experimental results. Further we extend our study for long length fiber and investigate the interplay between red-shifted solitonic resonant radiation and intrapulse Raman scattering (IPRS). It is observed that series of radiation-seeded Raman solitons are generated in anomalous dispersion regime.