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Characteristics of Sensor Response of a Difference Interferometric Slab Optical Waveguide Refractive Index Sensor with a Prism Coupling Method

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Abstract

We developed a difference interferometric slab optical waveguide (SOWG) refractive index (RI) sensor for flow analysis which used a prism coupling method. The highest sensitivity of 7.2×10-7 (DRI unit) was obtained with a glass SOWG fabricated with a radio frequency sputtering method for solution samples such as sucrose solutions and mixtures of ethanol and water; here sensitivity was defined as the DRI which gives the signal intensity of 10-4 in absorbance unit. The sensitivity is almost the same level as that of a surface plasmon resonance sensor.

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Authors and Affiliations

  1. Department of Chemistry, Gunma University, Kiryu, 376-8515, Japan

    Kin-ichi Tsunoda, Sae Kikuchi, Kiyohisa Nomura, Katsuyuki Aizawa, Kanae Okamoto & Hideo Akaiwa

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  1. Kin-ichi Tsunoda
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  2. Sae Kikuchi
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  3. Kiyohisa Nomura
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  4. Katsuyuki Aizawa
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  5. Kanae Okamoto
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  6. Hideo Akaiwa
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Tsunoda, Ki., Kikuchi, S., Nomura, K. et al. Characteristics of Sensor Response of a Difference Interferometric Slab Optical Waveguide Refractive Index Sensor with a Prism Coupling Method. ANAL. SCI. 15, 241–247 (1999). https://doi.org/10.2116/analsci.15.241

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  • DOI: https://doi.org/10.2116/analsci.15.241

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