Title :
Stability of the beam quality of 0.98-/spl mu/m InGaAlAs tapered laser oscillators
Author :
Schmitt, A. ; Mikulla, M. ; Walther, M. ; Kiefer, R. ; Braunstein, J. ; Weimann, G.
Author_Institution :
Fraunhofer-Inst. fur Angewandte Festkorperphys., Freiburg, Germany
fDate :
Aug. 30 1999-Sept. 3 1999
Abstract :
We have investigated the beam quality and the astigmatism of tapered semiconductor laser oscillators under perturbation conditions to specify under which conditions such devices can be employed for direct applications such as material processing. The observed saturation of the astigmatism is an important indication that when the laser output is focused the resulting spot position will not change significantly with changes in the pump current.
Keywords :
III-V semiconductors; aberrations; aluminium compounds; gallium arsenide; indium compounds; laser beams; laser transitions; quantum well lasers; 0.98 mum; InGaAlAs; InGaAlAs tapered laser oscillators; astigmatism; beam quality; direct applications; laser output; material processing; perturbation conditions; pump current; saturation; spot position; stability; tapered semiconductor laser oscillators; Laser beams; Laser feedback; Laser stability; Materials processing; Optical feedback; Oscillators; Power generation; Power lasers; Q factor; Surface emitting lasers;
Conference_Titel :
Lasers and Electro-Optics, 1999. CLEO/Pacific Rim '99. The Pacific Rim Conference on
Conference_Location :
Seoul, South Korea
Print_ISBN :
0-7803-5661-6
DOI :
10.1109/CLEOPR.1999.814681
