Title :
Low loss, alignment tolerant coupling from a GaAs/AlGaAs QW laser to a single mode fiber
Author :
Vusirikala, V. ; Gopalan, B. ; Kareenahalli, S. ; Dagenais, M. ; Wood, C.E.C. ; Stone, D.
Author_Institution :
Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA
Abstract :
In this paper, we propose and demonstrate a simple GaAs-AlGaAs SQW laser employing conventional growth and processing techniques. In this laser, the transverse spot size has been increased by the use of a diluted waveguide (Al mole fractions are graded from 30% in the core to 31% in the cladding). This laser butt-couples into a cleaved single mode fiber with only -2.8 dB loss, and has a -3 dB excess loss misalignment tolerance of ±3.4 μm in the lateral and ±1.6 μm in the transverse directions. The laser showed a T0 of 112 K, indicating that the leakage of carriers is not very significant
Keywords :
III-V semiconductors; aluminium compounds; gallium arsenide; laser modes; optical fabrication; optical fibre cladding; optical fibre couplers; optical fibre losses; packaging; quantum well lasers; 112 K; 2.8 dB; 3 dB; Al; Al mole fractions; GaAs-AlGaAs; GaAs-AlGaAs SQW laser; GaAs/AlGaAs QW laser; carrier leakage; diluted waveguide; excess loss misalignment tolerance; fiber cladding; fiber core; low loss alignment tolerant coupling; processing techniques; single mode fiber coupling; transverse directions; transverse spot size; Educational institutions; Fiber lasers; Gallium arsenide; Laser beams; Laser modes; Laser theory; Molecular beam epitaxial growth; Optical coupling; Semiconductor lasers; Waveguide lasers;
Conference_Titel :
Lasers and Electro-Optics Society Annual Meeting, 1995. 8th Annual Meeting Conference Proceedings, Volume 1., IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-2450-1
DOI :
10.1109/LEOS.1995.484479
