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Optical loss in large optical cavity 650 nm lasers [Letter]

Smowton, Peter Michael ORCID:, Thomson, John Duncan, Yin, M., Dewar, S. V., Blood, Peter, Bryce, A. C., Marsh, J. H., Hamilton, C. J. and Button, C. C. 2001. Optical loss in large optical cavity 650 nm lasers [Letter]. Semiconductor Science and Technology 16 (10) , L72-L75. 10.1088/0268-1242/16/10/104

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Using a segmented-contact method, we have measured the optical mode loss in a series of AlGaInP 650 nm large optical cavity laser diodes with cladding layer thicknesses of 1.0, 0.5 and 0.3 µm. For the thinnest cladding layer the loss is 24 cm-1 greater than the other devices and by comparison with transfer matrix calculations we show that this is due to penetration of the mode into the outer GaAs layers. The results show that the cladding thickness can be reduced to about 0.5 µm without significant increase in loss and threshold current and this could be beneficial in reducing the electrical and thermal resistance of the cladding layer in high power structures.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: Institute of Physics
ISSN: 0268-1242
Last Modified: 20 Oct 2022 09:11

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