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Distributed detection of quadratic Kerr effect in silica fibers using chirped-pulse φOTDR
Univ. do Porto, Spain .
KTH, School of Engineering Sciences (SCI), Applied Physics, Laser Physics. RISE Acreo, Sweden.
Univ. de Alcalá, Spain.
KTH, School of Engineering Sciences (SCI), Applied Physics, Laser Physics. RISE Acreo, Sweden .
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2019 (English)In: Proceedings Volume 11199, Seventh European Workshop on Optical Fibre Sensors / [ed] Kyriacos Kalli, Sinead O. O'Keeffe, Gilberto Brambilla, SPIE - International Society for Optical Engineering, 2019, Vol. 11199, article id 1119929Conference paper, Published paper (Refereed)
Abstract [en]

Monitoring the presence of external electric fields over large distances and detecting losses along power transmission networks, is of extreme importance nowadays due to concerns with environment, efficiency, cost and safety. In this work, we evaluate a method to achieve distributed measurements of the quadratic electro-optic Kerr effect in silica fibers in a distributed way. For this purpose, we integrate a twin-hole fiber filled with BiSn alloy electrodes and monitor its electric-field induced refractive index (RI) change Δn by using a chirped-pulse phase-sensitive OTDR (CP-ΦOTDR). By exploiting its high sensitivity (RI changes of the order of 10-9 ), we demonstrate that the proposed system is able to detect the intrinsic quadratic electrooptic nonlinearity (the electric Kerr effect) in the fiber, an effect that is usually considered to be too weak to be exploited for practical applications. Additionally, we show that the CP-ΦOTDR is sufficiently sensitive to measure the electric Kerr effect with untreated standard telecommunication fibers under realistic fields.

Place, publisher, year, edition, pages
SPIE - International Society for Optical Engineering, 2019. Vol. 11199, article id 1119929
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-265636DOI: 10.1117/12.2540755Scopus ID: 2-s2.0-85073362612ISBN: 9781510631236 (print)ISBN: 9781510631243 (electronic)OAI: oai:DiVA.org:kth-265636DiVA, id: diva2:1380301
Conference
7th European Workshop on Optical Fibre Sensors, EWOFS 2019, Limassol, Cyprus, 1-4 October 2019
Note

QC 20191219

Available from: 2019-12-18 Created: 2019-12-18 Last updated: 2019-12-19Bibliographically approved

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Pereira, JoaoMargulis, Walter

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