Simultaneous spectral recovery of long-period grating sensor array using optical time-division multiplexing

Lin, Han-Hyuan; Mokhtar, M.R.; Rahman, Fadzilah Abd; Abdul-Rashid, H. A.; Roslina, M.; Arif, Nor Azhar Mohd

doi:10.1016/j.ijleo.2011.06.014

Cited by 4 publications

(1 citation statement)

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“…The transmission spectrum of an LPG covers a relatively large wavelength bandwidth which can use up most of the bandwidth available from the light source used for the interrogation. To use a number of LPG sensors, multiplexing schemes ranging from time division [34] to optical frequency domain reflectometry [35] have been employed.…”

Section: A Long Period Gratingsmentioning

confidence: 99%

Resin Directional Flow and Degree of Cure Sensing Using Chirped Optical Fiber Long Period Gratings

et al. 2017

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The use of chirped long period gratings (CLPGs) for monitoring the flow, the direction of the flow and the subsequent cure of an epoxy resin is presented. The asymmetric properties of the CLPG and its sensitivity to refractive index changes were exploited to facilitate the measurement of the direction of the flow. The performances of a continuously chirped LPG (CCLPG) and a step chirped LPG (SCLPG) were compared, with the CCLPG showing improved spatial resolution. The CCLPG and SCLPG were also used to monitor changes in the refractive index of the resin during cure, with the results showing close agreement with measurements undertaken simultaneously using a fibre optic Fresnel refractometer.

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Section: A Long Period Gratingsmentioning

confidence: 99%