Title :
Single-frequency 1310-nm AlGaInAs-InP grating-outcoupled surface-emitting lasers
Author :
Masood, T. ; Patterson, S. ; Amarasinghe, N.V. ; McWilliams, S. ; Phan, D. ; Lee, D. ; Hilali, Z.A. ; Xiong Zhang ; Evans, G.A. ; Butler, J.K.
Author_Institution :
Photodigm Inc., Richardson, TX, USA
fDate :
3/1/2004 12:00:00 AM
Abstract :
Single-frequency 1310-nm grating-outcoupled surface-emitting (GSE) semiconductor lasers with output slope efficiencies exceeding 0.1 mW/mA into multimode fibers, threshold currents below 22 mA, and >30-dB sidemode suppression ratios are reported. These GSE lasers consist of 500-μm-long active ridges that excite one end of surface-emitting second-order outcoupling gratings with 200-μm-long first-order distributed Bragg reflector gratings terminating the laser cavities at both ends. The grating outcouplers range from 10 to 50 μm in length. These lasers have an open eye pattern for nonreturn-to-zero signals at 2.5 Gb/s into single-mode fibers. The full-width half-maximum far-field beam divergences range from 1.5/spl deg/ × 8/spl deg/ to 5/spl deg/ × 8/spl deg/.
Keywords :
Bragg gratings; III-V semiconductors; aluminium compounds; distributed Bragg reflectors; gallium compounds; indium compounds; integrated optics; laser cavity resonators; laser frequency stability; optical couplers; optical fibres; ridge waveguides; semiconductor lasers; surface emitting lasers; waveguide lasers; 10 to 50 mum; 1310 nm; 2.5 Gbit/s; 200 mum; 500 mum; AlGaInAs-InP; active ridges; far-field beam divergences; first-order distributed Bragg reflector gratings; full-width half-maximum; grating outcouplers; grating-outcoupled surface-emitting lasers; laser cavities; multimode fibers; nonreturn-to-zero signals; open eye pattern; semiconductor lasers; sidemode suppression ratios; single-frequency AlGaInAs-InP; single-mode fibers; slope efficiencies; surface emission; surface-emitting second-order outcoupling gratings; Bragg gratings; Chemical lasers; Distributed Bragg reflectors; Etching; Fiber lasers; Indium phosphide; Laser feedback; Pump lasers; Semiconductor lasers; Surface emitting lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.823708
