Title :
Sensitivity of grating-coupled surface emitters to length-induced phase variations
Author :
Hardy, Amos ; Mehuys, David ; Waarts, Robert G. ; Welch, David F. ; Streifer, William
Author_Institution :
Spectra Diode Lab. Inc., San Jose, CA, USA
fDate :
9/1/1990 12:00:00 AM
Abstract :
The longitudinal mode structure of a two-gain section, three-grating surface emitting laser is studied as a function of length-induced phase variations. It is found that several mode hops occur in the course of changing the length of one of the gain sections by one grating period. Although the number of mode hops can be reduced by optimizing the design, stable, single-mode laser operation appears to require control of the optical length of each gain and grating section to better than one wavelength
Keywords :
diffraction gratings; laser modes; semiconductor laser arrays; sensitivity; gain section length; grating period; grating section length; grating-coupled surface emitters; length-induced phase variations; longitudinal mode structure; mode hops; optical length; sensitivity; single-mode laser operation; three-grating surface emitting laser; two-gain section; wavelength comparable lengths; Gratings; Laser feedback; Laser modes; Optical control; Optical pumping; Optical refraction; Optical sensors; Optical surface waves; Optical variables control; Surface emitting lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
