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Proceedings Paper

Miniaturized long period grating sensor interrogator based on a thermally tunable arrayed-waveguide-grating demultiplexer
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Paper Abstract

A wavelength interrogation system based on an arrayed-waveguide-grating (AWG) is evaluated. The transmission wavelengths are capable of shifting by thermally scanning the AWG. By employing this AWG wavelength tunability scheme, the center wavelength of a long-period-grating (LPG) sensor is precisely interrogated. The theoretical principle and the experimental result are presented in this paper. An interrogated wavelength resolution of 0.5 pm is achieved by introducing this technique. Furthermore, a palm-size LPG sensor interrogator based on a chip integrated with an AWG demultiplexer, a photodiode, a signal processing module and an electronic controlling module is proposed.

Paper Details

Date Published: 10 April 2008
PDF: 5 pages
Proc. SPIE 6932, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008, 69320B (10 April 2008); doi: 10.1117/12.775818
Show Author Affiliations
Honglei Guo, Univ. of Ottawa (Canada)
Gaozhi Xiao, National Research Council of Canada (Canada)
Nezih Mrad, Dept. of National Defence (Canada)
Jianping Yao, Univ. of Ottawa (Canada)


Published in SPIE Proceedings Vol. 6932:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008
Masayoshi Tomizuka, Editor(s)

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