Title :
4 x 4 fan-out spot generator using GaAs based VCSEL´s and diffractive optical element
Author :
Ghisoni, M. ; Martinsson, H. ; Eriksson, N. ; Li, Ming ; Larsson, A. ; Bengtsson, J. ; Khan, A. ; Parry, G.
Author_Institution :
Dept. of Optoelectron. & Electr. Meas., Chalmers Univ. of Technol., Goteborg, Sweden
fDate :
4/1/1997 12:00:00 AM
Abstract :
We report the hybrid operation of a computer generated diffractive optical element, or kinoform, and a vertical cavity surface emitting laser, both elements being GaAs based. Using the laser as the optical input source the binary kinoform is shown to produce a focused 4/spl times/4 fan-out spot array, Diffraction efficiencies of approximately 20% and near diffraction limited spots are obtained for single moded VCSELs. The kinoform is also shown to function successfully for larger, multi-moded, VCSELs without significant performance drop.
Keywords :
III-V semiconductors; computer-generated holography; gallium arsenide; holographic optical elements; laser cavity resonators; laser modes; optical interconnections; semiconductor lasers; surface emitting lasers; 20 percent; 4/spl times/4 fan-out spot generator; GaAs; GaAs based VCSEL; binary kinoform; computer generated diffractive optical element; diffraction efficiencies; diffractive optical element; focused 4/spl times/4 fan-out spot array; hybrid operation; kinoform; multi-moded VCSEL; near diffraction limited spots; optical input source; performance drop; vertical cavity surface emitting laser; Etching; Gallium arsenide; Holographic optical components; Holography; Laser modes; Optical diffraction; Optical refraction; Semiconductor laser arrays; Surface emitting lasers; Vertical cavity surface emitting lasers;
Journal_Title :
Photonics Technology Letters, IEEE
