Pulse chirp increasing pulse compression followed by positive resonant radiation in fibers

TL;DR

This paper demonstrates that applying a small positive chirp to pulses in fibers enhances pulse self-compression and significantly boosts resonant radiation generation, improving wavelength conversion efficiency.

Contribution

It provides experimental and simulation evidence that positive chirp optimizes pulse compression and resonant radiation in fiber optics, extending previous findings.

Findings

Small positive chirp enhances pulse compression

Positive chirp increases resonant radiation generation

Pulse evolution can be studied without fiber cut

Abstract

Pulse self-compression followed by the generation of resonant radiation is a well known phenomenon in non-linear optics. Resonant radiation is important as it allows for efficient and tunable wavelength conversion. We vary the chirp of the initial pulse and find in simulations and experiments that a small positive chirp enhances the pulse compression and strongly increases the generation of resonant radiation. This result corroborates previously published simulation results indicating an improved degree of pulse compression for a small positive chirp [1]. It also demonstrates how pulse evolution can be studied without cutting back the fiber.