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Proceedings Paper

InGaAs/GaAs frequency tunable twin-guide quantum-well laser designed for steerable surface emission
Author(s): Matthias Rosenberger; Anton Koeck; Claire F. Gmachl; Erich Gornik; Henning Riechert; D. Bernklau
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Paper Abstract

Based on a frequency tunable twin-guide (TTG) InGaAs/GaAs multiple quantum well (MQW) laser structure, we developed a novel design concept for a surface emitting laser device enabling spatial beam steering. Utilizing a change in the refractive index of the parallel monolithically integrated modulator diode due to carrier injection, we observe a continuous emission frequency (wavelength) shift up to (Delta) f equals 85 GHz ((Delta) (lambda) equals -0.35 nm). For this preliminary structure the experimental results are consistent with our model calculations. Based on the theoretical model, for an optimized device a tuning range of (Delta) f equals 1600 GHz ((Delta) (lambda) >= 5 nm) is expected. For the novel surface emitting device design, we make use of an additional structure on top of the TTG laser including a second waveguide and a grating. This will enable a wavelength dependent surface emission angle, i.e., continuous beam steering, by coupling the laser and the surface mode. A calculational model was developed to estimate the steering characteristics in dependence on the dielectric device structure including mode guiding and the surface grating shape.

Paper Details

Date Published: 19 November 1993
PDF: 8 pages
Proc. SPIE 1985, Physical Concepts and Materials for Novel Optoelectronic Device Applications II, (19 November 1993); doi: 10.1117/12.162813
Show Author Affiliations
Matthias Rosenberger, Technische Univ. Muenchen (Germany)
Anton Koeck, Wr. Neustaedter Bildungs-und Forschungsg.m.b.H (Austria)
Claire F. Gmachl, Technische Univ. Muenchen (Germany)
Erich Gornik, Technische Univ. Wien (Austria)
Henning Riechert, Siemens AG (Germany)
D. Bernklau, Siemens AG (Germany)

Published in SPIE Proceedings Vol. 1985:
Physical Concepts and Materials for Novel Optoelectronic Device Applications II
Fabio Beltram; Erich Gornik, Editor(s)

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