Title :
Large spot-size narrow waveguide VCSEL
Author :
Zhou, Delai ; Lee, Tae-Woo ; Tansu, Nelson ; Hagness, Susan ; Mawst, Luke J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA
Abstract :
To obtain a large near-field spot-size (i.e. narrow far-field FWHM), a narrow waveguide design is utilized in edge-emitting lasers to expand the transverse mode. A similar situation was observed for the lateral VCSEL mode for a very small aperture oxide-define waveguide structure. A narrow-waveguide VCSEL design incorporating a separate current confinement aperture is shown schematically. This design then allows one to adjust the optical overlap with the gain region by choosing the current aperture. The device is fabricated by two-step MOCVD growth
Keywords :
MOCVD; laser modes; optical fabrication; semiconductor lasers; surface emitting lasers; waveguide lasers; current aperture; gain region; large spot-size narrow waveguide VCSEL; lateral VCSEL mode; narrow waveguide design; narrow-waveguide VCSEL design; optical overlap; separate current confinement aperture; transverse mode; two-step MOCVD growth; very small aperture oxide-define waveguide structure; Apertures; Distributed Bragg reflectors; Optical computing; Optical design; Optical transmitters; Optical waveguides; Power engineering and energy; Power generation; Thermal resistance; Vertical cavity surface emitting lasers;
Conference_Titel :
Lasers and Electro-Optics Society, 2001. LEOS 2001. The 14th Annual Meeting of the IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-7105-4
DOI :
10.1109/LEOS.2001.968876
