Temporal quality of post-compressed pulses at large compression factors

TL;DR

This paper investigates how the temporal quality of ultra-short laser pulses degrades at high compression factors and demonstrates methods to mitigate this deterioration, enabling improved femtosecond laser architectures.

Contribution

It provides a combined numerical and experimental analysis of pulse quality degradation and proposes dispersion management techniques to limit this effect at large compression factors.

Findings

Temporal quality degradation saturates at high compression factors.

Dispersion management effectively limits pulse quality deterioration.

Potential for advanced femtosecond laser systems based on high compression factors.

Abstract

Post-compression of ultra-short laser pulses via self-phase modulation is routinely employed for the generation of laser pulses with optical bandwidths reaching far beyond the laser gain limitations. While high compression factors can be routinely achieved, the compressed pulses typically suffer from temporal quality degradation. We numerically and experimentally analyze the deterioration of different measures of temporal quality with increasing compression factor and show how appropriate dispersion management and cascading of the post-compression process can be employed to limit the impact of this effect. The demonstrated saturation of pulse quality degradation at large compression factors puts novel femtosecond laser architectures based on post-compressed pico- or even nanosecond laser systems in sight.