Thermal Performance of 940 nm AlGaAs-Based VCSELs Grown on Germanium

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The effective thermal conductivity of 940 nm AlGaAs-based vertical-cavity surface-emitting lasers (VCSELs) is increased when they are grown on Germanium substrates rather than traditional GaAs substrates. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Craig P. Allford; Sara-Jayne Gillgrass; J. I. Davies; Samuel Shutts; Peter M. Smowton

doi:10.1109/jphot.2025.3552951

March 19, 2025IEEE photonics journalOpen Access

Thermal Performance of 940 nm AlGaAs-Based VCSELs Grown on Germanium

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Abstract

VCSEL thermal resistances are determined from power-current-voltage-wavelength measurements performed on nominally identical epitaxial structures grown on Ge and GaAs substrates. We show that the effective thermal conductivity of the VCSEL is increased when grown on Ge substrates.

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Allford et al. (2025) studied this question.

synapsesocial.com/papers/6aaa2f2a247ec6c94648302a https://doi.org/10.1109/jphot.2025.3552951

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Thermal Performance of 940 nm AlGaAs-Based VCSELs Grown on Germanium

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Thermal Performance of 940 nm AlGaAs-Based VCSELs Grown on Germanium

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