Wavelength Interrogation of a Tilted Fiber Bragg Grating Sensor Using Space-to-Wavelength Mapping of An Arrayed Waveguide Grating with Closed-Loop Piezo-Electrical Control

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DOIResolve DOI: http://doi.org/10.1109/ICSENS.2010.5690698
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Proceedings titleProceedings. Sensors, 2010 IEEE
ConferenceIEEE SENSORS 2010 Conference, Kona, Hawaii, November 01-04, 2010
Pages11521155; # of pages: 4
AbstractIn this paper, we report a novel wavelength interrogation technique to measure the relative wavelength spacing between two individual resonances of a tilted fiber Bragg grating (TFBG) sensor applied as a refractometer. The TFBG refractometer is sensitive to the refractive index changes in its surrounding medium and reflects the perturbation on its transmission wavelength changes. The presented technique is based on an arrayed waveguide grating (AWG) with its spaceto- wavelength mapping capability. The spatial position of the input beam is controlled by a closed-loop piezoelectric motor. The absolute transmission wavelength of target resonance is obtained by introducing the actual spatial position of the input beam, provided by a position feedback encoder, to the precalibrated space-to-wavelength mapping relationship. Therefore, the wavelength spacing of the two target resonances is obtained as well as the measurement of refractive index. Initial results show that the proposed AWG-based wavelength interrogator has a multi-channel measurement capability and the potential to be packaged into a portable, light weight and cost-effective device.
Publication date
AffiliationNational Research Council Canada; NRC Institute for Microstructural Sciences
Peer reviewedYes
NPARC number17673438
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Record identifier5254be79-973f-48bd-986a-7df927c878bc
Record created2011-04-01
Record modified2016-05-09
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