Title :
Anomalous linewidth narrowing in microwave beat frequency spectra between adjacent longitudinal modes in semiconductor lasers
Author :
DeChiaro, Louis F. ; Chemelli, Robert G.
Author_Institution :
Dept. of Comput. Sci., Richard Stockton Coll. of NJ, Pomona, NJ, USA
Abstract :
Microwave frequency signals resulting from the beats between adjacent longitudinal modes in long-cavity semiconductor lasers have been experimentally observed and numerically modeled by a rate-equation simulation. A periodic collapse of the beat frequency linewidth is observed and attributed to the onset of intermodal correlations in mode competition noise for values of bias current very close to those at which two adjacent longitudinal modes exhibit equal gain.
Keywords :
laser cavity resonators; laser modes; laser theory; semiconductor lasers; spectral line narrowing; 1.3 micron; adjacent longitudinal modes; anomalous linewidth narrowing; beat frequency linewidth periodic collapse; bias current; equal gain; intermodal correlations; long-cavity semiconductor lasers; microwave beat frequency spectra; microwave frequency signals; mode competition noise; rate-equation simulation; Chemical lasers; Distributed feedback devices; Fiber lasers; Frequency; Laser modes; Laser noise; Masers; Optical fiber communication; Semiconductor device noise; Semiconductor lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2003.818289
