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Fibre-optic evanescent field absorption sensor based on a U-shaped probe

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Abstract

A fibre-optic evanescent field absorption sensor based on a U-shaped sensing probe is described. The influences of fibre core diameter, bending radius of the probe and the refractive index of the fluid on the sensitivity of the sensor are evaluated experimentally. The results are compared with the theoretical results obtained using geometrical optics and based on two-dimensional treatment. A good qualitative agreement is found between them.

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Authors and Affiliations

  1. Physics Department, Indian Institute of Technology, 110016, New Delhi, India

    B. D. Gupta, H. Dodeja & A. K. Tomar

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  1. B. D. Gupta
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  2. H. Dodeja
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  3. A. K. Tomar
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Gupta, B.D., Dodeja, H. & Tomar, A.K. Fibre-optic evanescent field absorption sensor based on a U-shaped probe. Opt Quant Electron 28, 1629–1639 (1996). https://doi.org/10.1007/BF00331053

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  • DOI: https://doi.org/10.1007/BF00331053

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