Title :
Mode discrimination in distributed feedback grating surface emitting lasers containing a buried second-order grating
Author :
Carlson, Nils W. ; Liew, So Kuen ; Amantea, Robert ; Bour, David P. ; Evans, Gary A. ; Vangieson, Edward A.
Author_Institution :
David Sarnoff Res. Center, Princeton, NJ, USA
fDate :
6/1/1991 12:00:00 AM
Abstract :
The operating characteristics of a novel grating surface emitting laser structure containing a buried second-order grating have been studied both experimentally and theoretically. This device consists of a pumped distributed feedback (DFB) section that is terminated at each end by unpumped distributed Bragg reflector (DBR) sections. A single continuous second-order grating layer and waveguide layer extend throughout the active and passive sections so that there is essentially no fabricated optical discontinuity at the interface between the active and passive end sections. Single mode operation (>30 dB side mode suppression) and single-lobed far fields with negligible sidelobes are observed up to more than 5×Ith with spectral linewidths as narrow as 1 MHz
Keywords :
diffraction gratings; distributed Bragg reflector lasers; distributed feedback lasers; integrated optics; laser modes; semiconductor junction lasers; active sections; buried second-order grating; distributed feedback grating surface emitting lasers; interface; mode discrimination; operating characteristics; passive sections; pumped distributed feedback section; single continuous second-order grating layer; single mode operation; single-lobed far fields; spectral linewidths; unpumped distributed Bragg reflector sections; waveguide layer; Distributed Bragg reflectors; Distributed feedback devices; Gratings; Laser feedback; Laser modes; Laser theory; Optical surface waves; Optical waveguides; Pump lasers; Surface emitting lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
