Orr, Philip and Paterson, Alan and Niewczas, Pawel (2012) Interferometric time division FBG interrogator and multiplexer with static, dynamic, and absolute wavelength measurement capabilities. In: 22nd International Conference on Optical Fiber Sensors, 2012-10-15 - 2012-10-19, Beijing. (In Press)
|PDF (Interferometric time division FBG interrogator and multiplexer with static, dynamic, and absolute wavelength measurement capabilities) - Draft Version |
Available under License ["licenses_description_unspecified" not defined].
Download (388Kb) | Preview
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.
Actions (login required)