Title :
Mode instability and linewidth rebroadening in DFB lasers
Author :
Olesen, Henning ; Tromborg, Bjarne ; Lassen, H.E. ; Pan, Xing
Author_Institution :
TFL Telecommun. Res. Labs., Horsholm, Denmark
Abstract :
Results of a detailed linewidth theory for DFB lasers are presented. The authors show that the fluctuations in the longitudinal distributions of photon and carrier densities can have significant effect on the linewidth. A new type of linewidth rebroadening is identified, which is attributed to model instability. This may explain the rebroadening observed in cases with high sidemode suppression.
Keywords :
distributed feedback lasers; laser frequency stability; laser modes; laser theory; semiconductor junction lasers; spectral line breadth; DFB lasers; carrier density fluctuations; linewidth rebroadening; linewidth theory; model instability; photon density fluctuations; sidemode suppression;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920280
