Electric field and voltage sensing using thermally poled silica fibre with a simple low coherence interferometer

Michie, Andrew; Bassett, I.M.; Haywood, John

doi:10.1088/0957-0233/17/5/s47

Cited by 26 publications

(15 citation statements)

References 10 publications

(10 reference statements)

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“…A wide variety of fiber optic based electric field sensing schemes have been proposed and reported to date. These are mostly based on electro-optical crystals employed either in bulk optics or free-space type configurations or in an integrated waveguide type configuration [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Liquid crystal infiltrated photonic crystal fibers for electric field intensity measurements

Mathews¹,

Farrell²,

Semenova³

2011

Appl. Opt.

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The application of nematic liquid crystal infiltrated photonic crystal fiber as a sensor for electric field intensity measurement is demonstrated. The device is based on an intrinsic sensing mechanism for electric fields. The sensor probe, which consists of a 1 cm infiltrated section of photonic crystal fiber with a lateral size of ∼125 μm, is very compact with small size and weight. A simple all-fiber design for the sensor is employed in an intensity based measurement scheme. The transmitted and reflected power of the infiltrated photonic crystal fiber is shown to have a linear response with the applied electric field. The sensor is operated in the telecommunication window at 1550 nm. The temperature dependence of the device at this operating wavelength is also experimentally studied and discussed. These structures can be used to accurately measure electric field intensity and can be used for the fabrication of all-fiber sensors for high electric field environments as both an in-line and reflective type point sensor.

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Section: Introductionmentioning

confidence: 99%

Liquid crystal infiltrated photonic crystal fibers for electric field intensity measurements

Mathews¹,

Farrell²,

Semenova³

2011

Appl. Opt.

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“…The result also shows a phase shift effect that could be caused by a charging effect. This still a work in progress and the experiment can be improved in many ways: The use of a poled fiber could lead to an enhanced, and linear response [3], but with the advantage of not using a closed arrangement in an interferometric setup. Synchronous detection with a lock-in amplifier can improve the SNR.…”

Section: Discussionmentioning

confidence: 99%

High-voltage Sensor Based on Fiber Bragg Grating in Fibers with Electrodes

Pereira

Sartiano

Hervás

et al. 2020

Conference on Lasers and Electro-Optics

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“…Although the centrosymmetry of silica glass causes the χ (2) to be normally zero, poling has been shown to induce an effective non-zero χ (2) coefficient in the material and the appearance of the Pockels effect. Given the increase in sensitivity provided by the additional LEO, poled fibers have been implemented in the development of electro-optic devices such as optical modulators [33], all-fiber switches, or electric field sensors [34]. This technique involves recording a permanent field in the glass that breaks its inversion symmetry, allowing for the creation of a non-zero second-order nonlinearity.…”

Section: Pockels Electro-optic Effect and Poling In Silica Fibersmentioning

confidence: 99%

Towards Distributed Measurements of Electric Fields Using Optical Fibers: Proposal and Proof-Of-Concept Experiment

Magalhães

Pereira

Tarasenko

et al. 2020

Sensors

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Nowadays there is an increasing demand for the cost-effective monitoring of potential threats to the integrity of high-voltage networks and electric power infrastructures. Optical fiber sensors are a particularly interesting solution for applications in these environments, due to their low cost and positive intrinsic features, including small size and weight, dielectric properties, and invulnerability to electromagnetic interference (EMI). However, due precisely to their intrinsic EMI-immune nature, the development of a distributed optical fiber sensing solution for the detection of partial discharges and external electrical fields is in principle very challenging. Here, we propose a method to exploit the third-order and second-order nonlinear effects in silica fibers, as a means to achieve highly sensitive distributed measurements of external electrical fields in real time. By monitoring the electric-field-induced variations in the refractive index using a highly sensitive Rayleigh-based CP-φOTDR scheme, we demonstrate the distributed detection of Kerr and Pockels electro-optic effects, and how those can assign a new sensing dimension to optical fibers, transducing external electric fields into visible minute disturbances in the guided light. The proposed sensing configuration, electro-optical time domain reflectometry, is validated both theoretically and experimentally, showing experimental second-order and third-order nonlinear coefficients, respectively, of χ(2) ~ 0.27 × 10−12 m/V and χ(3) ~ 2.5 × 10−22 m2/V2 for silica fibers.

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Electric field and voltage sensing using thermally poled silica fibre with a simple low coherence interferometer

Cited by 26 publications

References 10 publications

Liquid crystal infiltrated photonic crystal fibers for electric field intensity measurements

Liquid crystal infiltrated photonic crystal fibers for electric field intensity measurements

High-voltage Sensor Based on Fiber Bragg Grating in Fibers with Electrodes

Towards Distributed Measurements of Electric Fields Using Optical Fibers: Proposal and Proof-Of-Concept Experiment

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