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Polarization optical bistability induced by TM mode injection to a DFB laser with complex coupled coefficient

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1 Author(s)
Shi, C.-X. ; Hitachi Cable Ltd., Ibaraki, Japan

A novel method is proposed to produce an optical bistability by using a dynamically stable complex coupled DFB (CC-DFB) laser with TM mode injection. In this paper polarization optical bistabilities are analyzed in detail using coupled mode equations and rate equations for the CC-DFB lasers considering the longitudinal hole burning and carrier dependent complex coupling coefficients. Several parameters reflecting the physical features of a complex coupled DFB laser are discussed. It is shown that for a CC-DFB laser the polarization bistability induced by the TM mode injection is much stronger for the antiphase of complex coupling than that for the in-phase. In addition, the influences of initial coupling condition for gain grating structure on the optical bistability are also investigated considering both cases of the antiphase and in-phase

Published in:

Lightwave Technology, Journal of  (Volume:14 ,  Issue: 4 )