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Fiber Bragg grating sensor interrogation system using a CCD side detection method with Superimposed blazed gratings

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5 Author(s)
Zhou, K. ; Photonics Res. Group, Aston Univ., Birmingham, UK ; Simpson, A.G. ; Chen, X. ; Zhang, L.
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We present, for the first time to our knowledge, experimental evidence showing that superimposed blazed fiber Bragg gratings may be fabricated and used to extend the dynamic range of a grating-based spectrometer. Blazed gratings of 4° and 8° were superimposed in germanosilicate fiber by ultraviolet inscription and used in conjunction with a coated charged-coupled device array to interrogate a wavelength-division-multiplexing sensor array. We show that the system can be used to monitor strain and temperature sensors simultaneously with an employable bandwidth which is extendable to 70 nm.

Published in:

Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 6 )

Date of Publication:

June 2004

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