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Proceedings Paper

Bragg wavelength deviation for TDM/WDM multiplexing systems
Author(s): Luiz C. S. Nunes; Luiz C. G. Valente; A. M. B. Braga
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Paper Abstract

An analysis of the Bragg wavelength deviation generated by TDM/WDM multiplexing of large number of fiber Bragg grating (FBG) sensors has been proposed. Demodulation technique based on Fixed Spectrum Filters is compared with peak position of full wavelength spectrum. Results indicate that the fixed filter approach is less sensitive to wavelength distortion due to shadow of other sensors operating at the same nominal wavelength, allowing much larger number of FBG sensors. A simulated result show less than 1 pm deviation with up to 100 sensors at same wavelength, with 1% peak reflectivity for each sensor.

Paper Details

Date Published: 23 May 2005
PDF: 4 pages
Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); doi: 10.1117/12.623800
Show Author Affiliations
Luiz C. S. Nunes, Univ. Federal Fluminense (Brazil)
Luiz C. G. Valente, Gavea Sensors (Brazil)
A. M. B. Braga, Pontificia Univ. Catolica do Rio de Janeiro (Brazil)


Published in SPIE Proceedings Vol. 5855:
17th International Conference on Optical Fibre Sensors
Marc Voet; Reinhardt Willsch; Wolfgang Ecke; Julian Jones; Brian Culshaw, Editor(s)

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