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Linewidth broadening in a distributed feedback laser integrated with a semiconductor optical amplifier

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6 Author(s)
A. Champagne ; Dept. de Genie Phys., Ecole Polytech. de Montreal, Que., Canada ; J. Camel ; R. Maciejko ; K. J. Kasunic
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The problem of the linewidth degradation in systems using distributed-feedback lasers together with strained-layer multi-quantum-well semiconductor optical amplifiers (SOAs) is examined. A modified expression for the linewidth in the case of anti reflection-coated SOA output facets is derived and simulation results are given in the case of output facets with a nonvanishing reflectivity. A numerical model combining finite-element calculations in the transverse x-y plane and a longitudinal model based on the Green's function method is used for that purpose.

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IEEE Journal of Quantum Electronics  (Volume:38 ,  Issue: 11 )