Thermal management in 2-µm InGaSb VECSEL using a hybrid-metal Bragg mirror

Nicolas Huwyler; Marco Gaulke; Jonas Heidrich; Matthias Golling; Ajanta Barh; Behçet Özgür Alaydin; Ursula Keller

doi:10.1117/12.2609716

1 April 2022 Thermal management in 2-µm InGaSb VECSEL using a hybrid-metal Bragg mirror

Nicolas Huwyler, Marco Gaulke, Jonas Heidrich, Matthias Golling, Ajanta Barh, Behçet Özgür Alaydin, Ursula Keller

Proceedings Volume PC11984, Vertical External Cavity Surface Emitting Lasers (VECSELs) XI; PC119840A (2022) https://doi.org/10.1117/12.2609716
Event: SPIE LASE, 2022, San Francisco, California, United States

Abstract

The key limiting factor for output power scaling of VECSELs is the thermal resistance of the structure owing to the DBR thickness and the heat conductivity of the semiconductor materials. We have successfully fabricated a flip-chip processed GaSb/AlAs0.08Sb0.92 hybrid DBR for 2 µm with only 7.5 mirror pairs and a 100-nm gold layer. The hybrid DBR reaches a high reflectivity >99.5% with a reduced total thickness of 2.3 µm. The measured spectral reflectivity of the hybrid DBR reveals a clear gold layer and matches theoretical simulations. High power 2-µm VECSEL development with the presented hybrid-mirror structure is under way.

Conference Presentation

Citation Download Citation

Nicolas Huwyler, Marco Gaulke, Jonas Heidrich, Matthias Golling, Ajanta Barh, Behçet Özgür Alaydin, and Ursula Keller "Thermal management in 2-µm InGaSb VECSEL using a hybrid-metal Bragg mirror", Proc. SPIE PC11984, Vertical External Cavity Surface Emitting Lasers (VECSELs) XI, PC119840A (1 April 2022); https://doi.org/10.1117/12.2609716

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