A high-resolution burst-mode laser transmitter with fast and accurate level monitoring for 1.25 Gb/s upstream GPONs

Bauwelinck, Johan; Chen, Wei; Verhulst, Dieter; Martens, Yves; Ossieur, Peter; Qiu, Xing-Zhi; Vandewege, Jan

doi:10.1109/jssc.2005.848024

Cited by 16 publications

(16 citation statements)

References 10 publications

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“…Most other systems have no security services except for the well-known user name/password mechanism. The security level of the developed FNMS is a great advantage for military applications [13].…”

Section: The Informatics and Information Security Research Center (Bi̇mentioning

confidence: 99%

A GIS-based novel active monitoring system for fiber networks

Akdemir¹,

Dursun²,

Arslan³

et al. 2016

Turk J Elec Eng & Comp Sci

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Abstract:In this study, a geographic information system (GIS)-based novel fiber network monitoring system has been developed to improve the operation and maintenance of fiber optic networks (FONs). The main aim of the developed system is to provide the required capabilities for both detailed digital modeling and central monitoring of FONs. The system can perform scheduled measurements and dispatch alarms if any fault or degradation is detected in the concerned FON. It also indicates the alarm locations on a map as a considerable contribution to decreasing mean time to repair.The developed monitoring system has more security features than others.

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Section: The Informatics and Information Security Research Center (Bi̇mentioning

confidence: 99%

A GIS-based novel active monitoring system for fiber networks

Akdemir¹,

Dursun²,

Arslan³

et al. 2016

Turk J Elec Eng & Comp Sci

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“…The best contemporary example of optical TDM networks is PON [8], [9]. For PONs, the link budget is tight because the optical-network unit (ONU) is a very cost-critical element residing at the customer premises.…”

Section: Introductionmentioning

confidence: 99%

Nonintrusive Fiber Monitoring of TDM Optical Networks

Mulder

Chen

Bauwelinck

et al. 2007

J. Lightwave Technol.

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Abstract-This paper introduces a new embedded nonintrusive fiber-monitoring technique for time-division-multiplexing optical networks. It allows an optical transmitter to characterize the fiber plant from reflections caused by data bursts transmitted across the network instead of dedicated test signals. The probing is performed with minimal burden on data traffic so that many measurements can be averaged to improve accuracy. The method is very suitable for embedded optical time-domain reflectometers (OTDR), which reuse a network node's optical data transmitter for OTDR excitations and embed a reflectometer inside the fiber endpoint. This paper models the OTDR with Laplace transforms, an approach previously unpursued, after which it is explained how reflections from multiple data bursts with arbitrary width can be converted into one normalized format. This new class of OTDR excites the fiber with a negative step of light instead of the conventional short pulse. The signal-to-noise ratio (SNR) for backscatter and Fresnel reflections caused by the negative step and pulse are compared theoretically. It is shown that negative-step OTDR breaks the tradeoff between excitation pulsewidth and distance resolution, has a natural separation between fiber backscatter and Fresnel reflectors, and improves the SNR of nonreflective events.

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“…FiberMon can provide round the clock data on the health status of the fiber plant, and trigger preventive actions without disturbing ongoing traffic nor penalizing the network performance. FiberMon was designed to be compatible with Gigabit PON (GPON) specifications [2][3], but can be used in a wide range of fiber networks provided that, after transmission of a data burst, suitable time windows can be found for acquiring the backscattering signal. The block diagram of an ONU burst-mode transmitter (BM-TX) with embedded non-intrusive OTDR functionality ( Fig.…”

Section: Introductionmentioning

confidence: 99%