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Mode instability and linewidth rebroadening in DFB lasers

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4 Author(s)
Olesen, H. ; TFL Telecommun. Res. Labs., Horsholm, Denmark ; Tromborg, B. ; Lassen, H.E. ; Pan, X.

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.

Published in:

Electronics Letters  (Volume:28 ,  Issue: 5 )