Interferometric time division FBG interrogator and multiplexer with static, dynamic, and absolute wavelength measurement capabilities

Philip Orr; Alan Paterson; Paweł Niewczas

doi:10.1117/12.974511

7 November 2012 Interferometric time division FBG interrogator and multiplexer with static, dynamic, and absolute wavelength measurement capabilities

Philip Orr, Alan Paterson, Paweł Niewczas

Author Affiliations +

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84218G (2012) https://doi.org/10.1117/12.974511
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

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.

Citation Download Citation

Philip Orr, Alan Paterson, and Paweł Niewczas "Interferometric time division FBG interrogator and multiplexer with static, dynamic, and absolute wavelength measurement capabilities", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84218G (7 November 2012); https://doi.org/10.1117/12.974511

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