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Design of ultra dense passive optical network to support high number of end users

Abstract : In this thesis, we study reflective electroabsorption modulators (EAMs) monolithically integrated with semiconductor optical amplifiers (SOAs) to realize wavelength-independent (colorless) transmitters for low-cost access network applications that require dense deployment of optical transceivers. The devices are based on GaInAsP/InP multiple quantum-wells (MQWs), leveraging semi-insulating buried heterostructure (SI-BH) waveguide and butt-joint integration technologies. We analyze different design tradeoffs by considering three modulator lengths (80, 100 and 150 μm). After fabrication, we perform a complete performance analysis of our components in both static and dynamic modes. We obtain >17 dB SOA gain with a noise figure of about 4 dB. For the EAM, we achieve >33 GHz modulation bandwidth and up to 15 dB dynamic extinction ratio. The EAMs exhibit zero-chirp for reverse bias voltages in the range between −1.2 V and −1.5 V, depending on the operating wavelength. For C-band components, we demonstrate up to 16 km colorless trans-mission, over 15 nm, at 25 Gb/s using non-return-to-zero (NRZ) modulation format. With components working in the O-band, we per-form up to 50 Gb/s NRZ as well as PAM-4 transmissions without equalization. Finally, we perform a 10 Gb/s multi-channel V-band/IFoF transmission, achieving <11% error vector magnitude.
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https://tel.archives-ouvertes.fr/tel-03306228
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Submitted on : Thursday, July 29, 2021 - 9:16:09 AM
Last modification on : Tuesday, October 19, 2021 - 11:14:11 AM

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Kebede Tesema Atra. Design of ultra dense passive optical network to support high number of end users. Optics / Photonic. Institut Polytechnique de Paris, 2021. English. ⟨NNT : 2021IPPAT010⟩. ⟨tel-03306228⟩

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