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Theoretical investigation of the second-order harmonic distortion in the AM response of 1.55 μm F-P and DFB lasers

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5 Author(s)
G. Morthier ; Lab. of Electromagn. & Acoust., Gent Univ., Belgium ; F. Libbrecht ; K. David ; P. Vankwikelberge
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Numerical calculations of the second-order harmonic distortion in the amplitude modulation-response of Fabry-Perot, and distributed feedback (DFB) lasers are presented, and the influence of several nonlinearities, such as longitudinal spatial hole burning, gain suppression, and relaxation oscillations are considered. This analysis is valid for modulation frequencies ranging from a few megahertz to well beyond the resonance frequency of the relaxation oscillation. The distortion of Fabry-Perot lasers for which the effects of spontaneous emission and gain suppression can be clearly illustrated is investigated. The distortion of DFB lasers where the emphasis is on the influence of spatial hole burning and its combination with other nonlinearities is discussed. Various effects are discussed

Published in:

IEEE Journal of Quantum Electronics  (Volume:27 ,  Issue: 8 )