A novel remote optical coding for PON monitoring systems using fiber bragg grating
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The need to implement techniques to monitor optical fiber links in passive optical networks (PONs), based on the principle of reflectometry, has motivated various research projects. Such studies are especially important for networks with tree topology or hierarchical topology, due to the difficulty to determine in which specific fiber branch there was rupture. This work proposes a novel model based on fiber Bragg grating to solve the complexity in the monitoring of point-multipoint networks. This mode uses multiple access techniques by division of optical codes in phase, to monitor the PONs. The work involved developing a novel PON monitoring model to detect fiber optic branches with problems that are analyzed by means of autocorrelation of optical pulses reflected by Bragg gratings. These Bragg gratings are strategically arranged in network terminal units. The results obtained through simulations demonstrate the viability of the proposed approach applied in Bragg grating 63 chips for identifies fault, in real time, in the network with 8, 16, 32 or 63 users. The system satisfactorily demonstrated its ability to monitor PONs, using fewer Bragg gratins and couplers, compared to the other models found in the literature, such as fault location in passive optical networks using T-Optical time-domain reflectometer and wavelength-selective isolators, remote coding scheme based on waveguide Bragg grating in power line communication splitter chip for PONs monitoring, optimal fiber link fault decision for optical 2D coding-monitoring scheme in passive optical networks, and centralized PONs monitoring scheme based on optical coding.
KeywordsFiber Bragg grating PON failure Monitoring OCDMA in phase
We formally thank the National Council for Scientific and Technological Development (CNPq), the Ceará State Agency for Technology and Scientific Development (FUNCAP) and the Coordination for the Improvement of Higher Level Personnel (CAPES) for the financial support provided for the accomplishment of this work. VHCA acknowledges the sponsorship from the Brazilian National Council for Research and Development (CNPq) via Grant No. 301928/2014-2. JJPCRodrigues acknowledges the National Funding from the FCT—Fundação para a Ciência e a Tecnologia through the UID/EEA/50008/2013 Project, by the Government of the Russian Federation, Grant 074-U01, by Brazilian National Council for Research and Development (CNPq) via Grant No. 309335/2017-5, and by Finep, with resources from Funttel, Grant No. 01.14.0231.00, under the Centro de Referência em Radiocomunicações—CRR project of the Instituto Nacional de Telecomunicações (Inatel), Brazil.
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Conflicts of interest
On behalf of all authors, the corresponding author states that there is no conflict of interest.
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