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Distributed detection of quadratic Kerr effect in silica fibers using chirped-pulse φoTDR
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- Magalhães, Regina (author)
- University of Porto, Portugal,Univ. do Porto, Spain
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- Pereira, Joao (author)
- KTH,RISE,Acreo,KTH Royal Institute of Technology, Sweden,Laserfysik,RISE Acreo, Sweden
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- Garcia-Ruiz, Andres (author)
- University of Alcalá, Spain,Univ. de Alcalá, Spain
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- University of Porto, Portugal Univ do Porto, Spain (creator_code:org_t)
- SPIE, 2019
- 2019
- English.
- In: Proceedings of SPIE - The International Society for Optical Engineering. - : SPIE. - 9781510631236 - 9781510631243
- Conference paper (peer-reviewed)
Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- Distributed sensing
- Kerr effect
- Optical sensors
- optical time domain reflectometry
- Rayleigh scattering
- Binary alloys
- Bismuth alloys
- Chirp modulation
- Electric fields
- Electric losses
- Electric power transmission networks
- Optical fibers
- Refractive index
- Silica
- Tin alloys
- Distributed detection
- Distributed measurements
- Electric field induced
- Electrooptic nonlinearities
- External electric field
- Telecommunication fibers
- Optical Kerr effect
Publication and Content Type
- ref (subject category)
- kon (subject category)
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