Design and performance of a novel automatic fiber line testing system with OTDR for optical subscriber loops

Tomita, Nobuo; Takasugi, H.; Atobe, N.; Nakamura, I.; Takaesu, F.; Takashima, S.

doi:10.1109/50.293959

Cited by 37 publications

(8 citation statements)

References 5 publications

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“…Therefore, growing attention has been given to devising a monitoring technique which will uniquely identify any faulty branch. The most direct approach is to actively select each branch fiber to examine at the splitter [4]- [11] or optical network units' (ONUs) area [12]- [17].…”

Section: Introductionmentioning

confidence: 99%

Precise Fault Location in TDM-PON by Utilizing Chaotic Laser Subject to Optical Feedback

et al. 2015

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We propose a method with high spatial resolution to detect fiber faults in a time-division multiplexing passive optical network (TDM-PON). A semiconductor laser serving as the probe light source is subjected to self-feedback caused by reflection at fiber faults. The feedback will induce the laser to generate chaos. Autocorrelation of the output time series shows the external cavity signature and, therefore, indicates the distance between the laser and the fiber fault. Each branch is identified by the marker that is formed by the inserted fiber Bragg grating (FBG) providing the feedback in each branch, and the faulty branch can be distinguished by the marker that has disappeared. Our proof-of-concept experiment demonstrates the identification of the faulty branch and the location of the fault point in an optical network simultaneously. This is achieved with a 6-km feeder fiber and realizes the 8-mm spatial resolution.

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Section: Introductionmentioning

confidence: 99%

Precise Fault Location in TDM-PON by Utilizing Chaotic Laser Subject to Optical Feedback

et al. 2015

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“…The Mach-Zehnder interferometer (MZI) formed by connecting waveguide-type optical couplers, such as directional couplers (DC), has attracted considerable attention as a wavelength demulti/multiplexer (WDM) for optical communication that is suitable for mass production and integration [13]. Using this MZI-WDM, we can easily demulti/multiplex light at two different wavelengths because of the nearly sinusoidal filtering characteristics obtained by the waveguide length difference between the interferometer arms.…”

Section: Introductionmentioning

confidence: 98%

Wavelength demulti/multiplexers with non-sinusoidal filtering characteristics composed of point-symmetrically connected Mach-Zehnder interferometers

Hida

Jinguji

Takato

1998

Electron. Comm. Jpn. Pt. II

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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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Design and performance of a novel automatic fiber line testing system with OTDR for optical subscriber loops

Cited by 37 publications

References 5 publications

Precise Fault Location in TDM-PON by Utilizing Chaotic Laser Subject to Optical Feedback

Precise Fault Location in TDM-PON by Utilizing Chaotic Laser Subject to Optical Feedback

Wavelength demulti/multiplexers with non-sinusoidal filtering characteristics composed of point-symmetrically connected Mach-Zehnder interferometers

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

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