Semiconductor laser amplitude and phase noises effects in coherent optical frequency domain reflectometry C-OFDR |
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Authors: | O Boukari L Hassine |
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Institution: | a Institut de Recherche des Systemes Electroniques EMbarqués (IRSEEM), École supérieur d’Ingénieur ESIGELEC, Technopôle du Madrillet, Avenue Galilée BP-10024, 76801 Saint Etienne du Rouvray Cedex, France b Unité de Recherche Physique Quantique et Photonique, Faculté des Sciences de Tunis, Campus Universitaire, Le Belvédère-1060, Tunisia |
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Abstract: | We study the effects of the semiconductor laser noise on the generated beat signal, in Coherent Optical Domain Reflectometry device. By using a general laser noise analytical model, based on Volterra non-linear treatment of laser rate equations, we find a novel general expression of the beat photocurrent. We show that the coherence and the incoherence cases are observed for a different delay time intervals than the ones known in literature. We show that the coherence domain corresponds to a delay time lower than the half of the laser coherence time τ0<1/2τc, and the incoherence domain corresponds for τ0>2τc. An original shape of the beat signal autocorrelation function affected by the laser noises is obtained. |
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Keywords: | Semiconductor lasers DFB Rate equations Volterra series Laser noises Coherent detection C-OFDR Tunable laser Beat frequency |
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