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Proceedings Paper

Interferometric time division FBG interrogator and multiplexer with static, dynamic, and absolute wavelength measurement capabilities
Author(s): Philip Orr; Alan Paterson; Paweł Niewczas
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Paper Abstract

We report on the design and preliminary testing of an interferometric interrogator capable of large-scale time-division multiplexing of FBG sensors. The scheme employs a passive algorithm for phase demodulation, allowing changes in FBG sensor reflected wavelengths to be calculated instantaneously upon arrival, and incorporates a technique for identification of initial absolute sensor wavelengths in order to overcome the measurement ambiguity associated with interferometric schemes. The proposed system will allow for high-speed interrogation of large-scale FBG sensor arrays with interferometric resolution and the capability for dynamic, static, and absolute FBG wavelength measurement.

Paper Details

Date Published: 7 November 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84218G (7 November 2012); doi: 10.1117/12.974511
Show Author Affiliations
Philip Orr, Univ. of Strathclyde (United Kingdom)
Alan Paterson, Univ. of Strathclyde (United Kingdom)
Paweł Niewczas, Univ. of Strathclyde (United Kingdom)

Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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