Frequency Stability Requirements in Quasi-Integer-Ratio Time-Expanded Phase-Sensitive OTDR
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Otros documentos de la autoría: Soriano-Amat, Miguel; Martins, Hugo; Durán, Vicente; Fermoso, Pablo; Martin-Lopez, Sonia; Gonzalez-Herraez, Miguel; Fernández Ruiz, María del Rosario
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https:// doi.org/10.1109/JLT.2022.3217651 |
Metadatos
Título
Frequency Stability Requirements in Quasi-Integer-Ratio Time-Expanded Phase-Sensitive OTDRAutoría
Fecha de publicación
2023-01-15Editor
IEEEISSN
0733-8724Cita bibliográfica
M. Soriano-Amat et al., "Frequency Stability Requirements in Quasi-Integer-Ratio Time-Expanded Phase-Sensitive OTDR," in Journal of Lightwave Technology, vol. 41, no. 2, pp. 777-783, 15 Jan.15, 2023, doi: 10.1109/JLT.2022.3217651.Tipo de documento
info:eu-repo/semantics/articleVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Time-expanded phase sensitive (TE-ϕ)OTDR is a recently reported technique for distributed fiber sensing that relies on the use of an electro-optic dual frequency comb (DFC) scheme. A distinctive feature of this approach ... [+]
Time-expanded phase sensitive (TE-ϕ)OTDR is a recently reported technique for distributed fiber sensing that relies on the use of an electro-optic dual frequency comb (DFC) scheme. A distinctive feature of this approach is its ability to provide high spatial resolution (on the centimeter scale) with detection bandwidths orders of magnitude lower than those of conventional ϕOTDR systems. The stringent trade-off between resolution, range and sensing bandwidth that exists in TE-ϕOTDR has demonstrated to be substantially relaxed by implementing two frequency combs with quasi-integer-ratio repetition rates. However, employing very dissimilar line separations (with a ratio between them >100) is challenging due to the need of keeping the coherence over long sequences of interferograms, which eventually limits the attainable range. In this paper, we formulate the requirements for the frequency stability of the reference clock used in a quasi-integer-ratio DFC scheme. This analysis allows us to stablish the limits on the number of comb lines (i.e., on the number of available independent sensing points) for a particular reference clock. By using a rubidium atomic clock (with a relative frequency stability of ∼10 −13 ), we demonstrate up to 10 5 sensing points along 2 km of fiber with tens of Hz sensing bandwidth. [-]
Publicado en
Journal of Lightwave Technology ( Volume: 41, Issue: 2, 15 January 2023)Entidad financiadora
Ministerio de Ciencia, Innovación y Universidades | FSE invierte en tu futuro | Comunidad de Madrid (Spain) | FEDER Program | Generalitat Valenciana | Universitat Jaume I | European Union NextGenerationEU/PRTR Program
Código del proyecto o subvención
MCIN/AEI/10.13039/501100011033 | PRE-2019–087444 and RYC-2017–23668 | MCIN/AEI/10.13039/501100011033 (Grant Number: IJC2018–035684-I) | 10.13039/100012818-Comunidad de Madrid | SINFOTON2-CM: S2018/NMT-4326 | 10.13039/501100003359-Generalitat Valenciana (Grant Number: PROMETEO/2020/029) | 10.13039/501100004834-Universitat Jaume I (Grant Number: UJI-B2019-45) | Spanish MCIN/AEI/10.13039/501100011033 | PSI ref. PLEC2021-007875 | Spanish MCIN/AEI/10.13039/501100011033 | RTI2018-097957-B-C31 | RTI2018-097957-B-C32 | RTI2018-097957-B-C33 | PID2021-128000OB-C21 | PID2021-128000OB-C22
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