Title :
Suppression of higher-order transverse modes in vertical-cavity lasers by impurity-induced disordering
Author :
Floyd, P.D. ; Peters, M.G. ; Coldren, L.A. ; Merz, J.L.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
Abstract :
Etched pillar, bottom emitting vertical cavity surface emitting lasers (VCSELs) employing a zinc diffused and disordered spatial mode filter are fabricated and tested. The filters successfully suppress lasing of higher order transverse modes in VCSELs with diameters greater than 11 μm, while obtaining output powers of up to 1.5 mW with threshold currents as low as 2.7 mA. Emission is entirely single mode, with mode suppression ratio greater than 25 dB up to the highest output power levels.
Keywords :
III-V semiconductors; gallium arsenide; indium compounds; laser cavity resonators; laser modes; quantum well lasers; spatial filters; surface emitting lasers; 1.5 mW; 11 mum; 2.7 mA; InGaAs; InGaAs quantum well lasers; VCSELs; bottom emitting vertical cavity surface emitting lasers; disordered spatial mode filter; etched pillar; higher order transverse laser mode suppression; higher-order transverse modes; highest output power levels; impurity-induced disordering; mode suppression ratio; output powers; single mode; threshold currents; vertical-cavity lasers; zinc diffused; Distributed Bragg reflectors; Etching; Filters; Gallium arsenide; Laser modes; Mirrors; Power generation; Surface emitting lasers; Vertical cavity surface emitting lasers; Zinc;
Journal_Title :
Photonics Technology Letters, IEEE
