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Proceedings Paper

Digital beam steering from surface-emitting laser diodes based on surface mode emission
Author(s): Anton Koeck; Alireza Golshani; R. Hainberger; Erich Gornik; Lutz Korte
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Paper Abstract

We present a surface emitting GaAs/AlGaAs laser diode beam steering device based on the surface mode emission (SME) technique. The SME-laser diodes operate in a single-mode and show efficient surface emission into a single beam with a minimum beam divergence of 0.11 degree(s). We demonstrate a large digital beam steering from this device, which is achieved by mode switching. The special SME-structure supports two single-mode emission wavelengths, which are spaced by 8.38 nm. Digital switching between these two modes by a proper current pulse sequence leads to a steering of the surface emitted single-beam by 4.9 degree(s). Presently the beam steering frequency is limited to a maximum value of 0.15 MHz. An optimized device design for a continuous steering of the single, surface emitted beam is proposed.

Paper Details

Date Published: 2 May 1997
PDF: 7 pages
Proc. SPIE 3001, In-Plane Semiconductor Lasers: from Ultraviolet to Midinfrared, (2 May 1997); doi: 10.1117/12.273788
Show Author Affiliations
Anton Koeck, Technische Univ. Wien (Austria)
Alireza Golshani, Technische Univ. Wien (Austria)
R. Hainberger, Technische Univ. Wien (Austria)
Erich Gornik, Technische Univ. Wien (Austria)
Lutz Korte, Siemens AG (Germany)

Published in SPIE Proceedings Vol. 3001:
In-Plane Semiconductor Lasers: from Ultraviolet to Midinfrared
Hong K. Choi; Peter S. Zory, Editor(s)

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