Dense wavelength-division demultiplexing of interferometrically interrogated fiber Bragg grating sensors

K. B. Rochford

doi:10.1117/12.2302122

1 September 1999 Dense wavelength-division demultiplexing of interferometrically interrogated fiber Bragg grating sensors

K. B. Rochford

Author Affiliations +

Proceedings Volume 3746, 13th International Conference on Optical Fiber Sensors; 37463O (1999) https://doi.org/10.1117/12.2302122
Event: 13th International Conference on Optical Fiber Sensors, 1999, Kyongju, Korea, Republic of

Abstract

We report accurate demultiplexing of fiber Bragg grating sensors with reflection wavelengths separated by less than 2 nm using a method based on Hilbert transforms of interferograms. Demultiplexing ofthree gratings with less than 4 pm crosstalk and repeatability, and 19 pm uncertainty was demonstrated. We anticipate that a large number of gratings can be multiplexed with a single broadband source and a single receiving interferometer, provided that the interferogram is sampled with accurate intervals close to the Nyquist rate.

Citation Download Citation

K. B. Rochford "Dense wavelength-division demultiplexing of interferometrically interrogated fiber Bragg grating sensors", Proc. SPIE 3746, 13th International Conference on Optical Fiber Sensors, 37463O (1 September 1999); https://doi.org/10.1117/12.2302122

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