Title :
Reduced optical scattering loss in vertical-cavity lasers using a thin (300 /spl Aring/) oxide aperture
Author :
Thibeault, B.J. ; Hegblom, E.R. ; Floyd, P.D. ; Naone, R. ; Akulova, Y. ; Coldren, L.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
fDate :
5/1/1996 12:00:00 AM
Abstract :
Calculations show that significant optical scattering loss persists as standard quarter-wave (800 /spl Aring/) thick, dielectrically apertured vertical cavity laser diameters are reduced below 4 μm and that thinner apertures can reduce the scattering loss, By using a thin (300 /spl Aring/) AlAs-oxide defined aperture, optical scattering loss has been dramatically reduced over the quarter-wave AlAs-oxide defined vertical-cavity laser. The optical loss reduction results in 2.3 μm diameter lasers with differential efficiencies of 0.43 (80% of the value of broad-area lasers) and continuous-wave single-mode powers of 1.2 mW.
Keywords :
aluminium compounds; distributed Bragg reflector lasers; laser cavity resonators; light scattering; optical losses; quantum well lasers; 1.2 mW; 2.3 mum; 300 A; AlAs; AlAs-oxide defined aperture, optical scattering loss; continuous-wave single-mode powers; dielectrically apertured vertical cavity laser diameters; differential efficiencies; optical loss reduction; optical scattering loss; quarter-wave AlAs-oxide defined vertical-cavity laser; thinner apertures; Apertures; Dielectric losses; Light scattering; Mirrors; Optical losses; Optical pumping; Optical resonators; Optical scattering; Oxidation; Vertical cavity surface emitting lasers;
Journal_Title :
Photonics Technology Letters, IEEE
