Real-Time Monitoring in Passive Optical Networks Using a Superluminescent LED With Uniform and Phase-Shifted Fiber Bragg Gratings

Naim, Nani Fadzlina; Ab-Rahman, Mohammad Syuhaimi; Bakarman, Hesham A.; Bakar, Ahmad Ashrif A

doi:10.1364/jocn.5.001425

Cited by 14 publications

(7 citation statements)

References 8 publications

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“…It is known that optical-time-domain reflectometry (OTDR) techniques are widely used in point-to-point (P2P) networks. However, it has major limitations in tree topology or point-tomultipoint (P2MP) network like PONs [15], [16]. In P2MP networks the OTDR trace at the central office (CO) is aggregation of the backscattered and reflected powers from all the network branches [17].…”

Section: Introductionmentioning

confidence: 99%

A PON Monitoring Scheme for Online Fault Detection and Localization

Zhang

Ning

2022

IEEE Photonics J.

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We propose and experimentally demonstrate an online PON monitoring scheme that can simultaneously achieve the objectives of fault detection and localization. Fault detection and localization share the same transmitter module and perform in sequence. Based on a simple algorithm, one or several fiber Bragg gratings with different central reflection wavelengths are allocated to each end-user for fault detection. A large number of wavelength combinations are generated by several fiber Bragg gratings with different center wavelengths, and are finally identified in the time domain, which is very suitable for fault detection of large-capacity and high-density PON. An additional module is added before the power splitter/combiner to ensure the online troubleshooting. The model equation is established to locate the fault using two unmodulated broadband light sources. The calculated results of the fault localization method show a good agreement with the OTDR measurement results. The proposed scheme provides an integrated online troubleshooting solution for the detection and localization of PON link faults.

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Section: Introductionmentioning

confidence: 99%

A PON Monitoring Scheme for Online Fault Detection and Localization

Zhang

Ning

2022

IEEE Photonics J.

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“…Phase-Shifted fiber Bragg gratings (PS-FBG) in silica fibers have already been demonstrated during the last decade as attractive very narrow filters for a variety of applications such as real-time monitoring, switching, and demodulating [1][2][3][4]. Special attention must be paid to the sensing field, where PS-FBGs find applications to detect ultrasound [5], pressure [6], and temperature [7], among others.…”

Section: Introductionmentioning

confidence: 99%

Bandpass transmission filters based on phase shifted fiber Bragg gratings in microstructured polymer optical fibers

et al. 2017

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In this contribution we report on the fabrication of novel bandpass transmission filters based on PS-FBGs in microstructured polymer fibers at telecom wavelengths. The phase mask technique is employed to fabricate several superimposed gratings with slight different periods in order to form Moiré structures with a single or various π phase shifts along the device. Simulations and experimental results are included in order to demonstrate very narrowband transmission filters. Experimental characterization under strain and temperature variations is provided in a non-annealed fiber and time stability of the fabricated devices has been also measured under different pre-strain conditions.

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“…A monitoring scheme using a combination of a phase-shifted FBG (PS-FBG) and a uniform FBG (U-FBG) was presented in [12]. In each branched fiber, either a PS-FBG or a U-FBG was inserted at each branched fiber before the ONU.…”

Section: Introductionmentioning

confidence: 99%