Title :
Single-mode, single-lobe operation of surface-emitting 2nd-order DFB lasers
Author :
Lopez, J. ; Witjaksono, G. ; Botez, D.
Author_Institution :
Wisconsin Univ., Madison, WI, USA
Abstract :
We present the realization of single-lobe surface-emitting devices, which instead of using a chirped grating employ a simpler technique: strongly asymmetric coating of cleaved mirror facets. It is found that for high duty-cycle (70%) grating devices single-lobe emission occurs over a wide range of grating phase values at the high reflectivity facet: 10°-80°. Furthermore, it is found that placing phase shifts around n/2 in the center of the grating provides orthonormal, single-lobe operation with nearly uniform near-field intensity profiles
Keywords :
antireflection coatings; diffraction gratings; distributed feedback lasers; laser modes; optical films; quantum well lasers; surface emitting lasers; InGaAs-InGaAsP; antireflective coating; cleaved mirror facets; grating phase values; high duty-cycle grating devices; high reflectivity coating; high reflectivity facet; nearly uniform near-field intensity profiles; orthonormal single-lobe operation; phase shifts; single-mode single-lobe operation; strongly asymmetric coating; surface-emitting second-order DFB lasers; Chirp; Coatings; Gallium arsenide; Gold; Gratings; Mirrors; Neodymium; Reflectivity; Surface emitting lasers; Vertical cavity surface emitting lasers;
Conference_Titel :
LEOS '99. IEEE Lasers and Electro-Optics Society 1999 12th Annual Meeting
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-5634-9
DOI :
10.1109/LEOS.1999.813620
