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Theses

Flexible optical transport networks : benefits of the combination of time and spectral domains to adapt the granularity of optical resources to the needs of operators

Abstract : The ever increasing traffic demand is a big challenge for the operators to increase the network capacity while lowering CAPEX and OPEX. To address these challenges, it is expected to increase flexibility of the network resources allocation while realizing directly the IP traffic routing in the optical layer. In this background, the “TIme and Spectral optical Aggregation (TISA)” approach has thus been proposed to allow a purely optical aggregation with the finest possible granularity thanks to the combination of temporal and spectral domains. The main objective of this thesis was to realize a proof of concept of the TISA concept to demonstrate experimentally the feasibility of the TISA solution. To accomplish this objective, we have designed and realized a multi-band OFDM optical burst transmitter with a narrow linewidth fast tunable laser. This laser has been implemented by combining external cavity lasers with semiconductor optical amplifier based optical gates. The transmitter is able to generate OFDM bursts in both DP-QPSK and DP-16QAM modulation formats while introducing a small penalty compared to the continuous flows configuration. We have performed the transmission of these bursts through the TISA network and have measured the bit error rates, which show less than 1 dB penalty for both modulation formats. Our results clearly show the feasibility of the TISA solution and demonstrate the ability to perform a purely optical aggregation/disaggregation and transparent routing while offering a sub-wavelength granularity in both time and spectral domains at the optical layer level.
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  • HAL Id : tel-03409254, version 1

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Bing Han. Flexible optical transport networks : benefits of the combination of time and spectral domains to adapt the granularity of optical resources to the needs of operators. Networking and Internet Architecture [cs.NI]. Télécom ParisTech, 2018. English. ⟨NNT : 2018ENST0018⟩. ⟨tel-03409254⟩

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