Long Measurement Range OFDR Beyond Laser Coherence Length

Ding, Zhenyang; Yao, X. Steve; Liu, Tiegen; Du, Yu; Liu, Kun; Han, Qun; Zhang, Meng; Jiang, Junfeng; Chen, Hongxin

doi:10.1109/lpt.2012.2233728

Cited by 39 publications

(18 citation statements)

References 9 publications

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“…However, more complex networks, such as long reach GPON (G.984.7), may reveal stricter requirements for monitoring solutions. These can be addressed by changing the reflectometry technique, e.g., to photon-counting OTDR (PC-OTDR) or optical frequency domain reflectometry (OFDR) [8][9][10], which can potentially provide larger dynamic range.…”

Section: Fpm Concept and Operationmentioning

confidence: 99%

Detection of Fiber Faults in Passive Optical Networks

Urban¹,

Getaneh

Weid

et al. 2013

J. Opt. Commun. Netw.

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Wider deployment of fiber in the last mile is driven by increased customer needs for broadband communication services. This deployment requires solutions that reduce operational expenditures for the operator. A costefficient fully reliable and accurate monitoring solution supporting fault detection, identification, and localization in different fiber access architectures will be essential. In this article, we present a fast, automatic, and precise monitoring method applicable to both power-splitter-and wavelength-router-based passive optical networks through the combined techniques of optical time domain reflectometry and optical transceiver monitoring. The description of the architecture, components, and process flow is followed by tests on setups with live data transmission.

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Section: Fpm Concept and Operationmentioning

confidence: 99%

Detection of Fiber Faults in Passive Optical Networks

Urban¹,

Getaneh

Weid

et al. 2013

J. Opt. Commun. Netw.

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“…The common-mode frequency noise of the two wavelengths was suppressed by detecting directly the interferometric phase difference at both wavelengths. Several solutions based on reference interferometers were also proposed in scientific and patent literature, in order to compensate the interferometric phase noise for absolute range finders [5] or for optical frequency domain reflectometry [6,7].…”

Section: Introductionmentioning

confidence: 99%

Interferometric measurements beyond the coherence length of the laser source

Salvadé¹,

Przygodda²,

Röhner³

et al. 2016

Opt. Express

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Abstract:Interferometric measurements beyond the coherence length of the laser are investigated theoretically and experimentally in this paper. Thanks to a high-bandwidth detection, high-speed digitizers and a fast digital signal processing, we have demonstrated that the limit of the coherence length can be overcome. Theoretically, the maximal measurable displacement is infinite provided that the sampling rate is sufficiently short to prevent any phase unwrapping error. We could verify experimentally this concept using a miniature interferometer prototype, based on a frequency stabilized vertical cavity surface emitting laser. Displacement measurements at optical path differences up to 36 m could be realized with a relative stability better than 0.1 ppm, although the coherence length estimated from the linewidth and frequency noise measurements do not exceed 6.6 m.

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“…Band-width division has been combined with phase-noise-compensation to locate reflections as far as 40 km at an improved spatial-resolution of 5 cm [9]. Most recent, phase-noise measurement for a swept-laser reflected from points beyond the laser coherence length has allowed the location of Fresnel reflections as far as 170 km at a spatial resolution of 200 m [10].…”

Section: Introductionmentioning

confidence: 99%