1. Fast Gain Dynamics in Interband Cascade Lasers.
- Author
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Pilat, Florian, Windischhofer, Andreas, Beiser, Maximilian, Pecile, Vito F., Gangrskaia, Elizaveta, Pugžlys, Audrius, Weih, Robert, Koeth, Johannes, Baltuška, Andrius, Heckl, Oliver H., and Schwarz, Benedikt
- Subjects
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OPTOELECTRONICS , *LASERS , *MEASUREMENT - 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 ≈$\approx$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. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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