Thèse soutenue

Photorécepteur intégré SOA-PIN pour les applications à 100 Gbit/s

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Auteur / Autrice : Christophe Caillaud
Direction : Didier ÉrasmeMohand Achouche
Type : Thèse de doctorat
Discipline(s) : Électronique et communications
Date : Soutenance en 2010
Etablissement(s) : Paris, Télécom ParisTech

Résumé

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This work focuses on the design and fabrication of high speed photodiodes and their integration with a semiconductor optical preamplifier for short reach 100 gbit/s links. The first section of this study is dedicated to the optimization of an utc photodiode for 100 gbit/s links. Due to the implementation of an electric field in the absorption layer, owing to a gradual doping, and the optimization of a multimode waveguide, a high responsivity (0,6 A/W at 1,55 µm), an ultra wide 3-dB bandwidth (>120 ghz) and a high saturation current (20 MA at 50 GHz) are simultaneously achieved. Secondly, the study of shallow ridge soa and their comparison with buried soa show the advantages of BRS soa to realize an integrated SOA-PIN. The design of the integrated component is then presented and its technology is described. Finally, the SOA-PIN characterization demonstrates simultaneously a high responsivity 88 A/W), a low polarization dependence (<1 dB), a low noise factor (8. 5 dB) and a wide 3-dB bandwidth (≈65 ghz), which put our components at the best state of the art level. Simulations show our receivers would present a 40 Gbit/s sensivity improved by 2 dB as compared to competitors which demonstrate receivers with high noise factor soa. At 100 Gbit/s, the soa-pin would reach a high sensitivity of -18 dbm.