Overview of the FABULOUS EU Project: Final System Performance Assessment With Discrete Components

Abrate, S.; Straullu, Stefano; Nespola, A.; Savio, Paolo; Chang, Joana; Ferrero, Valter; Charbonnier, B.; Gaudino, Roberto

doi:10.1109/jlt.2015.2482226

Cited by 8 publications

(9 citation statements)

References 15 publications

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“…As DSP has big importance in allowing the FABULOUS architecture to reach the performances previously explained, we moved a step forward to demonstrate that such DSP is reasonably feasible considering the access networks market. In [9] we made an extensive analysis that lead us to conclude that implementing all the processing on a 65 nm CMOS platform would need a 7 mm 2 ASIC and have a power consumption lower than 5 W. In this work we also show that we recently implemented the DSP functions required for the proposed US transmission using commercial FPGA platforms, for both demonstrating real-time operation and the possibility of implementing our system using relatively low sample rates for the DSP. For what concerns the US receiver, the board is equipped as follows:  a two-channels analog to digital converter (ADC) running at 1200 MSps which operates after self-coherent detection and electrical IQ demodulation;  a Virtex 7 VX485T FPGA running on a 300 MHz internal clock.…”

Section: Real-time Operation: Preliminary Resultsmentioning

confidence: 81%

Demonstration of Upstream WDM+FDMA Reflective PON and Real-Time Implementation on an FPGA Platform

Straullu

Savio

Nespola

et al. 2016

J. Lightwave Technol.

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We present a comprehensive set of measurements on the reflective PON upstream architecture conceived within the FABULOUS Project, in its 4-wavelengths configuration, showing the possibility of dramatically increasing the number of users or the bit-rate per user with respect to single-wavelength operation, demonstrating a 128 Gbps capacity up to interesting values of Optical Distribution Network losses. In addition, a comparison with the NG-PON2 standardized in G.989 at the same bit-rate is held, showing that accepting to reduce the per-wavelength bitrate of our architecture to 10 Gbps in a 4-wavelengths network can provide great power budgets. Real-time implementation of the upstream on a FGPA platform is demonstrated as well, showing little penalty with respect to off-line experiments.We also theoretically analyze possible performance improvements when higher-bandwidth modulators are used, and we discuss on the system flexibility offered by our proposal.

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Section: Real-time Operation: Preliminary Resultsmentioning

confidence: 81%

Demonstration of Upstream WDM+FDMA Reflective PON and Real-Time Implementation on an FPGA Platform

Straullu

Savio

Nespola

et al. 2016

J. Lightwave Technol.

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“…On the other hand, optical-beat-interference (OBI) and carrier-induced Rayleigh back-scattering (RBS), as well as both multiple SOPLs and PNs, could affect the uplink signal [27]- [29]. The optical carrier from multiple-ONUs and LO carrier could interfere with each other due to square-law detection by a PD.…”

Section: A Target Co-pon Multiple Access Optical Link For Verificatimentioning

confidence: 99%

Multiple Access Noise Compensation in CO-OFDMA-PON Uplink Transmission Using Digital Phase Conjugated-Pilot Tones

2020

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In coherent orthogonal frequency division multiple accessing technique-based passive optical network (CO-OFDMA-PON) uplink transmission, two main multiple-access noises (MNs), which are multiple-state-of-polarization leakages (SOPLs) and phase noises (PNs) inevitably occur by various optical network units (ONUs) and interfere with the uplink signal in this system. These MNs are different by optical devices and paths of each ONU. In this regard, parallel MNs handling per ONU is necessary to provide uplink service. We propose digital phase conjugated pilot-tones (DPC-PTs) based MNs compensation technique. This can deal with MNs by using superposition of two adjacent pilot subcarriers. In the experiments conducted, we applied a pair of DPC-PTs per ONU to handle two MNs and performed parallel processing for each ONU. The transmission performance in terms of root-mean-square error, error-vector magnitude, bit-error-rate (BER), and the overhead of redundant PTs was improved by using the proposed technique in 20-km CO-OFDMA-PON uplink transmission. Both MNs were effectively compensated by comparing transmitted and received DPC-PTs. Minimum overhead of 0.39 % OFDMA symbol duration was verified to meet BER target in the given transmission condition. It guarantees more accurate tracking of SOPL than single-PT-based one due to the doubled number of estimator samples. Besides, more accurate tracking of PNs is demonstrated due to lower noise level between DPC-PTs. As a result, applicability to the phase and polarization diversities-based coherent multiple access is demonstrated through the proposed MNs tracking technique. INDEX TERMS Coherent optical communications, phase noise, polarization, multiple access, passive optical network.

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“…In this article, we present the results obtained in the frame of the European FP7-project FABULOUS, dedicated to the development of complex integrated optical circuits for innovative high bit-rate passive optical networks (PONs), fabricated by standard-CMOS technologies [17,18]. The final goal, which is the insertion of the chip in a real passive network, imposes very strict requirements on the loss of the component, which has to be kept as low as possible, as the reflective-PON approach yields a very challenging power budget.…”

Section: Introductionmentioning

confidence: 99%

Low-Loss Micro-Resonator Filters Fabricated in Silicon by CMOS-Compatible Lithographic Techniques: Design and Characterization

et al. 2017

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Abstract:Optical resonators are fundamental building-blocks for the development of Si-photonics-integrated circuits, as tunable on-chip optical filters. In addition to the specific spectral shape, which may vary according to a particular application, extremely low losses from these devices are a crucial requirement. In the current state-of-the-art devices, most low-loss filters have only been demonstrated by exploiting ad hoc lithographic and etching techniques, which are not compatible with the standard CMOS (complementary metal-oxide semiconductor) process-flow available at Si-photonic foundries. In this paper, we describe the design and optimization of optical micro-resonators, based on Si-waveguides with a height lower than the standard ones (i.e., less than 220 nm), prepared on SOI (silicon on insulator) platform, which allow the realization of high-performance optical filters with an insertion loss lower than 1 dB, using only previously validated lithographic etch-depths.

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Overview of the FABULOUS EU Project: Final System Performance Assessment With Discrete Components

Cited by 8 publications

References 15 publications

Demonstration of Upstream WDM+FDMA Reflective PON and Real-Time Implementation on an FPGA Platform

Demonstration of Upstream WDM+FDMA Reflective PON and Real-Time Implementation on an FPGA Platform

Multiple Access Noise Compensation in CO-OFDMA-PON Uplink Transmission Using Digital Phase Conjugated-Pilot Tones

Low-Loss Micro-Resonator Filters Fabricated in Silicon by CMOS-Compatible Lithographic Techniques: Design and Characterization

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