Title :
Curved-grating, surface-emitting distributed feedback lasers
Author :
Macomber, Steven H. ; Mott, Jeffrey S. ; Schwartz, Bradley D. ; Setzko, Richard S. ; Logue, James E.
Author_Institution :
Hughes Danbury Opt. Syst. Inc., CT, USA
Abstract :
Surface-emitting distributed feedback (SE-DFB) lasers have a gold-coated grating on the p-contact surface that provides feedback and diffracts guided-mode radiation into the surface normal. To date, broad-area SE-DFB devices have produced as much as nine watts cw output power and 27 percent total "wall-plug" efficiency under continuous wave operating conditions. Grating chirp has been shown to improve the output efficiency as well as produce nearly diffraction-limited beam quality along the longitudinal direction. However, the lateral beam quality of broad area SE-DFB laser has been poor due to multi-mode operation and filamentation.
Keywords :
chirp modulation; diffraction gratings; distributed feedback lasers; laser feedback; laser modes; quantum well lasers; surface emitting lasers; 27 percent; 9 W; Au; Au-coated grating; GaAs; MQW laser; continuous wave operating conditions; curved-grating surface-emitting distributed feedback lasers; cw output power; feedback; filamentation; grating chirp; guided-mode radiation diffraction; lateral beam quality; longitudinal direction; multi-mode operation; nearly diffraction-limited beam quality; p-contact surface; total wall-plug efficiency; Chirp; Diffraction gratings; Distributed feedback devices; Laser beams; Laser feedback; Laser modes; Optical feedback; Optical surface waves; Surface emitting lasers; Waveguide lasers;
Conference_Titel :
Lasers and Electro-Optics Society Annual Meeting, 1996. LEOS 96., IEEE
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-3160-5
DOI :
10.1109/LEOS.1996.565153
