Maintenance method using 1650-nm wavelength band for optical fiber cable networks

Nakao, N.; Izumita, Hisashi; Inoue, Takashi; Enomoto, Yoshitaka; Araki, Noriyuki; Tomita, Nobuo

doi:10.1109/50.956138

Cited by 24 publications

(5 citation statements)

References 1 publication

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“…The ability to manage a large amount of fibers and fiber connections becomes even more critical as the outside fiber plant infrastructure grows rapidly coupled with the inherent churn in access networks. Several approaches have been proposed to reduce the cost of operation, administration, maintenance [13,14], and optical fiber line testing systems for single star networks [15,16]. Nevertheless, these approaches often concentrate on efficient ways of transferring information from the outside plant to the Central Office (CO).…”

Section: Introductionmentioning

confidence: 99%

Applications of large-scale optical 3D-MEMS switches in fiber-based broadband-access networks

Madamopoulos

Kaman²,

Yuan³

et al. 2009

Photon Netw Commun

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Applications of non-blocking large-scale optical switches based on three-dimensional micro-electro-mechanical system (3D-MEMS) technology with small size and low power consumption are described for fiber-based broadband access networks. The low-loss and fast-switching 3D-MEMS switches offer remotely reconfigurable and automated operational solutions for access networks such as fiber management, preventative maintenance, monitoring, testing, and troubleshooting of a large number of end customers. Furthermore, the wavelength, data rate, and protocol-transparent nature of 3D-MEMS switches results in a future-proof optical distribution network design for future higher speed and higher capacity wavelength division multiplexing overlay upgrades over the passive optical network (PON). We show that large-scale 3D-MEMS switches deployed in PON environments can offer over an order of magnitude in capital and operational savings in comparison to manual patch panels (in deployed fiber hardware, real estate, and manual labor) with minimal impact on the overall network design.

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Section: Introductionmentioning

confidence: 99%

Applications of large-scale optical 3D-MEMS switches in fiber-based broadband-access networks

Madamopoulos

Kaman²,

Yuan³

et al. 2009

Photon Netw Commun

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“…On the other hand, owing to the limitation of the ONT intelligence to reduce its cost, while the quality of the data signals exchanged between the CO equipment and the ONTs is known by the system, the real-time fibre link quality information is not available without a monitoring system. To overcome the limited performance of conventional OTDR measurements in a TDM point-tomultipoint optical network, some authors have proposed different techniques in order to ensure that each individual branch contributes to the OTDR trace in a distinguishable way, such as using OTDR and fibre Bragg grating (FBG) [3,4], Raman amplification [5], optical code division multiplexing [6], embedded low-cost OTDR inside ONTs [7] or drop-fibres with individually assigned Brillouin frequency shifts [8]. A spectral analysis using an optical spectrum analyser (OSA) instead of OTDR equipment has also been reported with the same purpose [9].…”

Section: Introductionmentioning

confidence: 99%

Radio-frequency self-referencing system for monitoring drop fibres in wavelength division multiplexing passive optical networks

Montalvo

Montero

Vázquez

et al. 2010

IET Optoelectronics

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A low-cost monitoring system for measuring the optical power losses of drop fibres in wavelength division multiplexing (WDM) passive optical networks (PON) is reported. The proposed system is based on radio-frequency intensity modulation and fibre Bragg grating self-referencing measurement techniques using amplitude normalisation. The monitoring unit is built with an optical broadband light source illuminating the PON from the central office for testing purposes, and the signal processing of the measurements is provided by the low-frequency analogue filters and by a lock-in amplifier. The system allows measuring the optical power losses of the PON branches independently, with increased sensitivity in a re-configurable and flexible way. The monitoring technique has been studied and experimentally validated in a coarse WDM-PON prototype, as a first approach to dense WDM-PON applications. The merits of the proposed monitoring system with regards to other WDM-PON monitoring techniques and the scalability of the proposed system to dense WDM-PON architectures are also discussed.

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“…Several systems for testing the optical subscriber networks have already been reported [4][5][6][7]. In these systems, the testing techniques are mainly based on OTDR (optical time domain reflectometry).…”

Section: Introductionmentioning

confidence: 99%

Elongation of measurement range by successively shifting measurement window in a high spatial resolution reflectometry for optical subscriber networks by synthesis of optical coherence function

Kashiwagi¹,

Hotate²

2004

Meas. Sci. Technol.

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A reflectometry system having a high spatial resolution and an elongated measurement range is constructed, considering an application to optical subscriber networks, using a technique of synthesis of optical coherence function (SOCF). In this system, parameters have been adjusted so that the measurement range is elongated by successively shifting the 20 m measurement window while keeping a high spatial resolution. Reflectivity distribution around the end of a 5 km test fibre is successfully measured with a spatial resolution of 11 cm and an elongated measurement range of 1 km.

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Maintenance method using 1650-nm wavelength band for optical fiber cable networks

Cited by 24 publications

References 1 publication

Applications of large-scale optical 3D-MEMS switches in fiber-based broadband-access networks

Applications of large-scale optical 3D-MEMS switches in fiber-based broadband-access networks

Radio-frequency self-referencing system for monitoring drop fibres in wavelength division multiplexing passive optical networks

Elongation of measurement range by successively shifting measurement window in a high spatial resolution reflectometry for optical subscriber networks by synthesis of optical coherence function

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