Transverse mode confinement in lithographic VCSELs.

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Title: Transverse mode confinement in lithographic VCSELs.
Authors: Deppe, D.G.1 (AUTHOR) ddeppe@sdphotonics.com, Leshin, J.1 (AUTHOR), Eifert, L.2 (AUTHOR), Tucker, F.2 (AUTHOR), Hillyer, T.2 (AUTHOR)
Source: Electronics Letters (Wiley-Blackwell). Nov2017, Vol. 53 Issue 23, p1598-1600. 3p.
Abstract: Index confinement is studied experimentally and through modelling for lithographic vertical‐cavity surface‐emitting lasers (VCSELs) and contrasted with other types of VCSELs. Modelling shows that the index confinement is set by the height of a shallow internal mesa that produces the optical mode confinement. Overgrowth with a semiconductor mirror enables a range of index confinement from zero (no index guiding) similar to proton‐implanted VCSELs to much higher confinement than viable for oxide VCSELs. Lasing spectra are studied for side‐mode‐suppression ratio and beam patterns are compared for high and low indexes confined VCSELs of different sizes. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Index confinement is studied experimentally and through modelling for lithographic vertical‐cavity surface‐emitting lasers (VCSELs) and contrasted with other types of VCSELs. Modelling shows that the index confinement is set by the height of a shallow internal mesa that produces the optical mode confinement. Overgrowth with a semiconductor mirror enables a range of index confinement from zero (no index guiding) similar to proton‐implanted VCSELs to much higher confinement than viable for oxide VCSELs. Lasing spectra are studied for side‐mode‐suppression ratio and beam patterns are compared for high and low indexes confined VCSELs of different sizes. [ABSTRACT FROM AUTHOR]
ISSN:00135194
DOI:10.1049/el.2017.2780