Incident-power-dependent refractive index of ferrofluid in magnetic field measured with a fiber optic probe

Using the Fresnel reflection geometry and a fiber optic probe, a strong effect of interrogating light intensity on an effective refractive index of ferrofluid placed in magnetic field was observed and measured. With a moderate level of light power from 0.5 mW to 135 mW, an effective refractive index...

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Bibliographic Details
Published inOptik (Stuttgart) Vol. 186; pp. 418 - 422
Main Authors Shlyagin, M.G., Agruzov, P.M., Pleshakov, I.V., Prokofiev, A.V., Bibik, E.E.
Format Journal Article
LanguageEnglish
Published Elsevier GmbH 01.06.2019
Subjects
Fiber-optic sensors
Magnetic fluid
Refractive index
Fiber-optic sensors
Refractive index
Magnetic fluid
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Summary:Using the Fresnel reflection geometry and a fiber optic probe, a strong effect of interrogating light intensity on an effective refractive index of ferrofluid placed in magnetic field was observed and measured. With a moderate level of light power from 0.5 mW to 135 mW, an effective refractive index of kerosene-based ferrofluid was increasing with rising of light power by more than 4% at the same strength of magnetic field. It is important to note, no such dependence was observed without magnetic field applied. Also, influence of light power on dynamics of optical response on magnetic field impulse was observed.
ISSN:0030-4026
1618-1336
DOI:10.1016/j.ijleo.2019.04.130