Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/15998
Title: Simultaneous two-parameter sensing using a single tilted moiré fiber bragg grating with discrete wavelet transform technique
Authors: Wong, ACL
Giovinazzo, M
Tam, HY 
Lu, C 
Peng, GD
Keywords: Fiber grating sensor
Refractive index (RI)
Simultaneous two-parameter sensing
Temperature
Tilted Moiré Fiber Bragg Grating (TMFBG)
Issue Date: 2010
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE photonics technology letters, 2010, v. 22, no. 21, 5560731, p. 1574-1576 How to cite?
Journal: IEEE photonics technology letters 
Abstract: We propose and demonstrate using a single tilted moir fiber Bragg grating (TMFBG) with the discrete wavelet transform (DWT) technique for simultaneous measurement of refractive index (RI) and temperature. The particular feature of interest is that the spectrum consists of two separate parts associated with the phase-shifted main Bragg mode and discrete cladding modes, and that they have distinctive responses to RI and temperature. Our results showed that the cladding modes are, while the Bragg mode is not, sensitive to the surrounding RI. On the other hand, both the Bragg and cladding modes have the same linear temperature response. Hence, temperature can be obtained from the Bragg mode shift, and RI from the differential shift between the Bragg and cladding modes. In our experiment, the measured shifts of the Bragg and cladding modes can be unambiguously determined by applying the DWT technique. Thus, simultaneous two-parameter sensing using only a single TMFBG sensor is realized.
URI: http://hdl.handle.net/10397/15998
ISSN: 1041-1135
EISSN: 1941-0174
DOI: 10.1109/LPT.2010.2072955
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