Cold-cavity measurement of optical loss from oxide-confined vertical-cavity surface-emitting lasers

Microcavity laser design and performance optimization requires a quantitative knowledge of the cavity optical losses. A generalized method using sub-threshold spectral measurements matched to model calculations is demonstrated to determine optical loss in microcavity lasers. Cold-cavity spectral cha...

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Bibliographic Details
Published in:Applied physics letters 2014-03, Vol.104 (10)
Main Authors: Fryslie, Stewart T. M., Siriani, Dominic F., Choquette, Kent D.
Format: Article
Language:English
Subjects:
Applied physics
Design optimization
Lasers
Model matching
Vertical cavity surface emission lasers
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Summary:Microcavity laser design and performance optimization requires a quantitative knowledge of the cavity optical losses. A generalized method using sub-threshold spectral measurements matched to model calculations is demonstrated to determine optical loss in microcavity lasers. Cold-cavity spectral characteristics are used to extract the size-dependent optical loss for small diameter oxide-confined vertical-cavity surface emitting lasers. For oxide aperture diameters less than 4 μm, the oxide scattering loss can be greater than 10 cm−1, similar to the typical values of free carrier absorption loss.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4868038