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

Honglei Guo; Gaozhi Xiao; Nezih Mrad; Jianping Yao D.D.S.

doi:10.1117/12.775818

10 April 2008 Miniaturized long period grating sensor interrogator based on a thermally tunable arrayed-waveguide-grating demultiplexer

Honglei Guo, Gaozhi Xiao, Nezih Mrad, Jianping Yao D.D.S.

Author Affiliations +

Proceedings Volume 6932, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008; 69320B (2008) https://doi.org/10.1117/12.775818
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2008, San Diego, California, United States

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.

Citation Download Citation

Honglei Guo, Gaozhi Xiao, Nezih Mrad, and Jianping Yao D.D.S. "Miniaturized long period grating sensor interrogator based on a thermally tunable arrayed-waveguide-grating demultiplexer", Proc. SPIE 6932, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008, 69320B (10 April 2008); https://doi.org/10.1117/12.775818

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