Title :
Small efficient vertical cavity lasers with tapered oxide apertures
Author :
Hegblom, E.R. ; Margalit, N.M. ; Fiore, A. ; Coldren, L.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
fDate :
4/30/1998 12:00:00 AM
Abstract :
The authors demonstrate vertical cavity lasers utilising tapered apertures to close the active region, permitting good current confinement combined with low optical scattering losses. Because the slope efficiency remains high at small sizes, devices as small as 2 μm in diameter have wall-plug efficiencies of >20%. By better scaling, wall-plug efficiencies of 17-25% are achieved at low output powers of 100-500 μW
Keywords :
optical losses; semiconductor laser arrays; surface emitting lasers; 100 to 500 muW; 17 to 25 percent; 2 micron; active region; current confinement; optical scattering losses; output powers; slope efficiency; tapered oxide apertures; vertical cavity lasers; wall-plug efficiencies;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19980617
