High-speed tunable photonic crystal fiber-based femtosecond soliton source without dispersion pre-compensation

TL;DR

This paper introduces a high-speed, tunable photonic crystal fiber source that generates stable femtosecond solitons across a broad infrared range without needing dispersion pre-compensation, simplifying the setup.

Contribution

It demonstrates a novel fiber-based source capable of tuning wavelengths while maintaining pulse quality without additional dispersion compensation.

Findings

Pulsewidth remains nearly constant over tuning range

Spectral width remains nearly constant over tuning range

Effective operation even with heavily chirped pump pulses

Abstract

We present a high-speed wavelength tunable photonic crystal fiber-based source capable of generating tunable femtosecond solitons in the infrared region. Through measurements and numerical simulation, we show that both the pulsewidth and the spectral width of the output pulses remain nearly constant over the entire tuning range from 860 to 1160 nm. This remarkable behavior is observed even when pump pulses are heavily chirped (7400 fs^2), which allows to avoid bulky compensation optics, or the use of another fiber, for dispersion compensation usually required by the tuning device.