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Design of a New-Type Electro-Optical Sensor Based on the Total-Internal Reflection Theory in Heterodyne Interferometry

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Abstract:

In this paper, a new-type electro-optical sensor based on the total-internal reflections theory in heterodyne interferometry is proposed. The sensor is designed as a semi-circle shape. It is made of BK7 glass with the refractive index of 1.51509. And the end surface of the sensor is designed as a micro-mirror. The phase difference between s-and p-polarizations at the output of the optical fiber sensor can be obtained when a heterodyne optical source is launched into the electro-optical sensor at a suitable incident angle. By numerical calculation, the resolution of the system by using the intensity method can reach refractive index unit (RIU) in the measurement range of. The electro-optical sensor could be valuable for chemical, biological and biochemical sensing. It is with some advantages, such as, high resolution and stability, high sensitivity and real-time measurement.

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Advanced Materials Research V View Preview

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Periodical:

Advanced Materials Research (Volume 1105)

Pages:

136-140

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1105.136

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Online since:

May 2015

Authors:

Shinn Fwu Wang*, Fu Hsi Kao, An Li Liu

Keywords:

Electro-Optical Sensor, Heterodyne Interferometry (HI), Multiple Total-Internal Reflections (MTIRs), Refractive Index Unit (RIU)

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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