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Proceedings Paper

Active WDM demodulation scheme for fiber Bragg grating sensors
Author(s): Francisco M. Araujo; Luis Alberto Almeida Ferreira; Jose Luis Santos; Faramarz Farahi
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Paper Abstract

A closed loop technique for measuring Bragg wavelength shifts based on active wavelength tuning of a WDM coupler is presented. By stretching the coupling region of a fused biconical WDM, the 3 dB point is set by the feedback loop to always match the reflected Bragg wavelength. With this scheme, sensitivities usually associated with highly selective WDM can be obtained without compromising the measurement range.

Paper Details

Date Published: 3 February 1999
PDF: 6 pages
Proc. SPIE 3541, Fiber Optic and Laser Sensors and Applications; Including Distributed and Multiplexed Fiber Optic Sensors VII, (3 February 1999); doi: 10.1117/12.339109
Show Author Affiliations
Francisco M. Araujo, INESC-Porto (Portugal)
Luis Alberto Almeida Ferreira, INESC-Porto (Portugal)
Jose Luis Santos, Univ. do Porto (Portugal) and INESC-Porto (Portugal)
Faramarz Farahi, Univ. of North Carolina/Charlotte (United States)


Published in SPIE Proceedings Vol. 3541:
Fiber Optic and Laser Sensors and Applications; Including Distributed and Multiplexed Fiber Optic Sensors VII
Alan D. Kersey; John P. Dakin; John P. Dakin; Alan D. Kersey; Dilip K. Paul, Editor(s)

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