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Proceedings Paper

Novel approach for simultaneous wireless transmission and evaluation of optical sensors
Author(s): Niels Neumann; Tobias Schuster; Dirk Plettemeier
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Paper Abstract

Optical sensors can be used to measure various quantities such as pressure, strain, temperature, refractive index, pH value and biochemical reactions. The interrogation of the sensor can be performed spectrally or using a simple power measurement. However, the evaluation of the sensor signal and the subsequent radio transmission of the results is complicated and costly. A sophisticated system setup comprising a huge number of electrooptical components as well as a complete radio module is required. This is not only expensive and unreliable but also impractical within harsh environment, in limited space and in inaccessible areas. Radio-over-Fiber (RoF) technology implies signals modulated on an electrical carrier being transmitted over fiber by using optical carriers. Combining RoF techniques and optical sensors, a new class of measurement devices readable by a radio interfaces is introduced in this paper. These sensors use a modulated input signal generated by a RoF transmitter that { after being influenced by the optical sensor--is directly converted into a radio signal and transmitted. This approach enables remote read-outs of the sensor by means of wireless evaluation. Thus, costly, voluminous, power hungry and sensitive equipment in the vicinity of the measurement location is avoided. The equipment can be concentrated in a central location supporting existing radio transmission schemes (e.g. WiFi).

Paper Details

Date Published: 11 November 2014
PDF: 9 pages
Proc. SPIE 9274, Advanced Sensor Systems and Applications VI, 927402 (11 November 2014); doi: 10.1117/12.2070053
Show Author Affiliations
Niels Neumann, Technische Univ. Dresden (Germany)
Tobias Schuster, Technische Univ. Dresden (Germany)
Dirk Plettemeier, Technische Univ. Dresden (Germany)

Published in SPIE Proceedings Vol. 9274:
Advanced Sensor Systems and Applications VI
Tiegen Liu; Shibin Jiang; Niels Neumann, Editor(s)

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