Title :
Bow-tie surface-emitting lasers
Author :
Bedford, Robert ; Luo, Hui ; Fallahi, Mahmoud
Author_Institution :
Opt. Sci. Center, Arizona Univ., Tucson, AZ, USA
Abstract :
We report a new design for surface emitting semiconductor lasers operating at 940 nm, incorporating a double-flare cavity, and distributed Bragg reflector (DBR) mirrors also providing surface emission. This design can take advantage of the modal behavior of the unstable resonator, and has shown very good mode control, with coherent emission from two facets in the same direction. We report preliminary performance results showing very promising characteristics including single-mode diffraction limited operation, and spectral behavior with 42 dB side-mode suppression. This design has exhibited promising results for increasing the current range between the lasing threshold and the filament threshold.
Keywords :
distributed Bragg reflector lasers; laser beams; laser cavity resonators; laser mirrors; laser modes; laser stability; quantum well lasers; semiconductor lasers; surface emitting lasers; 940 nm; bow-tie surface-emitting lasers; coherent emission; current range; design; distributed Bragg reflector mirrors; double-flare cavity; facets; filament threshold; laser characteristics; lasing threshold; modal behavior; mode control; preliminary performance results; side-mode suppression; single-mode diffraction limited operation; spectral behavior; surface emission; surface emitting semiconductor lasers; unstable resonator; Bragg gratings; Distributed Bragg reflectors; Laser feedback; Laser modes; Mirrors; Optical control; Optical design; Optical resonators; Semiconductor lasers; Surface emitting lasers;
Journal_Title :
Photonics Technology Letters, IEEE
