Fast Gain Dynamics in Interband Cascade Lasers
Optics
2024-05-17 v1
Abstract
Interband Cascade Lasers (ICL) have matured into a versatile technological platform in the mid-infrared spectral domain. To broaden their applicability even further, ongoing research pursues the emission of ultrashort pulses. The most promising approach is passive mode-locking with a fast saturable absorber. However, despite vast attempts no passive mode-locked ICL has been demonstrated up to date. In this study we perform pump-probe measurements on the ICL gain and show that its dynamics are mainly (70%) governed by a fast recovery time of 2 ps. Our findings explain why passive mode-locking has not succeeded so far, shedding a new light on ICL dynamics as we propose strategies to overcome the current limitations.
Cite
@article{arxiv.2405.10203,
title = {Fast Gain Dynamics in Interband Cascade Lasers},
author = {Florian Pilat and Andreas Windischhofer and Maximilian Beiser and Vito F. Pecile and Elizaveta Gangrskaia and Audrius Pugžlys and Robert Weih and Johannes Koeth and Andrius Baltuška and Oliver H. Heckl and Benedikt Schwarz},
journal= {arXiv preprint arXiv:2405.10203},
year = {2024}
}