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Optical Engineering

Design and experimental study of the controlled two-dimensional-intensity profile of the output beam from a broad-area laser diode using grating outcouplers
Author(s): Viktor O. Smolski; Oleg V. Smolski; Eric C. Browy; Eric G. Johnson; Zane A. Shellenbarger
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Paper Abstract

We present a method of designing a grating outcoupler to obtain the desired two dimensional-intensity profile and improved field distribution of the optical beam emitted by a grating coupled surface-emitting laser. The method is based on variation of the periodicity, the duty cycle, and the groove tilt angle of the grating. Grating design involves numerical analysis of the optical field propagated through the grating by applying the rigorous coupled wave approach method. Experimental evaluation of the designed grating components was done by fabrication and testing the broad area semiconductor lasers with the monolithically integrated grating outcouplers. We present a grating design that provides the spreading of a single optical output into multibeams at different outcoupling angles in the emitting plane. We also present an approach to provide uniform optical intensity profile from the grating outcoupler based on varying duty cycle.

Paper Details

Date Published: 9 July 2012
PDF: 5 pages
Opt. Eng. 51(7) 074204 doi: 10.1117/1.OE.51.7.074204
Published in: Optical Engineering Volume 51, Issue 7
Show Author Affiliations
Viktor O. Smolski, Univ. of North Carolina at Charlotte (United States)
Oleg V. Smolski, Univ. of North Carolina at Charlotte (United States)
Eric C. Browy, Univ. of North Carolina at Charlotte (United States)
Eric G. Johnson, Clemson Univ. (United States)
Zane A. Shellenbarger, SRI International Sarnoff (United States)

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