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Proceedings Paper

Single-mode single-lobe operation of surface-emitting second-order distributed feedback lasers
Author(s): Jerry Lopez; Gunawan Witjaksono; Dan Botez
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Paper Abstract

Thin-p-clad, 0.97 micrometers -emitting lasers with 2nd-order Au/air gratings and asymmetrically facet-coated, surface emit in a diffraction-limited (0.11 degree(s)) lobe, in agreement with theory. Then, symmetrically AR-coated surface-emitting devices with central phase shifts >= (lambda) /4 are found to lase in an orthonormal single lobe with good efficiency and near-field uniformity. The best solution is to use surface emitters with central phase shift and DBR end mirrors: external differential quantum efficiencies of 60 - 70% are obtained over wide ranges (120 - 160 degree(s)C) in central-phaseshift value.

Paper Details

Date Published: 18 April 2000
PDF: 6 pages
Proc. SPIE 3947, In-Plane Semiconductor Lasers IV, (18 April 2000); doi: 10.1117/12.382099
Show Author Affiliations
Jerry Lopez, Univ. of Wisconsin/Madison (United States)
Gunawan Witjaksono, Univ. of Wisconsin/Madison (United States)
Dan Botez, Univ. of Wisconsin/Madison (United States)


Published in SPIE Proceedings Vol. 3947:
In-Plane Semiconductor Lasers IV
Luke J. Mawst; Ramon U. Martinelli, Editor(s)

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