<div class="csl-bib-body">
<div class="csl-entry">Pilat, F., Windischhofer, A., Beiser, M., Pecile, V. F., Gangrskaia, E., Pugžlys, A., Weih, R., Koeth, J., Baltuška, A., Heckl, O. H., & Schwarz, B. (2024). Fast Gain Dynamics in Interband Cascade Lasers. <i>Laser & Photonics Reviews</i>, 1–6. https://doi.org/10.1002/lpor.202400867</div>
</div>
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dc.identifier.issn
1863-8880
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/204126
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dc.description.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, pump-probe measurements are conducted on the ICL gain, demonstrating that ≈60–70% of its dynamic behavior is characterized by a rapid recovery time of 2 ps. The findings explain why passive mode-locking of ICLs has not succeeded so far, shedding a new light on ICL dynamics as strategies are proposed to overcome the current limitations.
