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17 March 2023 Femtosecond pulses from a backside-cooled 2-µm, GDD balanced InGaSb VECSEL
Marco Gaulke, Jonas Heidrich, Nicolas Huwyler, Matthias Golling, Ajanta Barh, Ursula Keller
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Proceedings Volume 12404, Vertical External Cavity Surface Emitting Lasers (VECSELs) XII; 124040F (2023) https://doi.org/10.1117/12.2649837
Event: SPIE LASE, 2023, San Francisco, California, United States
Abstract
We report on a SESAM modelocked GDD balanced VECSEL embedding the active region in quaternary Al15Ga85AsSb. The GDD is flattened by a multilayer semiconductor dielectric top-coating allowing for stable femtosecond operation with a standard SESAM and high-quality YAG Brewster windows. We avoid tradeoffs that would limit the output power. This GDD balanced VECSEL is the next step towards higher level of integration: pump-DBR implementation, demonstration of 1:1 modelocking, and absorber integration will yield a 2-µm MIXSEL, where gain medium and absorber are grown in one monolithic structure.
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Marco Gaulke, Jonas Heidrich, Nicolas Huwyler, Matthias Golling, Ajanta Barh, and Ursula Keller "Femtosecond pulses from a backside-cooled 2-µm, GDD balanced InGaSb VECSEL", Proc. SPIE 12404, Vertical External Cavity Surface Emitting Lasers (VECSELs) XII, 124040F (17 March 2023); https://doi.org/10.1117/12.2649837
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KEYWORDS
Femtosecond phenomena
Mode locking
Quantum wells
Antireflective coatings
Multilayers
Refractive index
YAG lasers
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