Polarisation control in VCSELs by elliptic surface etching

850 nm-wavelength vertical-cavity surface-emitting lasers (VCSELs) with an elliptical shallow surface relief having various aspect ratios and orientations have been fabricated. Using appropriate etch dimensions. VCSELs of up to 12.5 mu m active diameter are forced to operate on the fundamental mode...

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Bibliographic Details
Published inElectronics letters Vol. 38; no. 2; pp. 77 - 78
Main Authors Unold, H.J., Riedl, M.C., Michalzik, R., Ebeling, K.J.
Format Journal Article
LanguageEnglish
Published 17.01.2002
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Summary:850 nm-wavelength vertical-cavity surface-emitting lasers (VCSELs) with an elliptical shallow surface relief having various aspect ratios and orientations have been fabricated. Using appropriate etch dimensions. VCSELs of up to 12.5 mu m active diameter are forced to operate on the fundamental mode for a certain current range. By aligning the longer axis of the etched ellipse with the [011] or [011] crystal axis, the polarisation of the fundamental mode is pinned accordingly with a polarisation suppression ratio of [similar to]30 dB.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0013-5194
DOI:10.1049/el:20020040