Pressure effects on the temperature sensitivity of fiber Bragg gratings | Zendy

Meng-Chou Wu | Zendy

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Pressure effects on the temperature sensitivity of fiber Bragg gratings

Author(s) -

Meng-Chou Wu

Publication year - 2013

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.177

H-Index - 75

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.4789229

Subject(s) - materials science , fiber bragg grating , wavelength , refractive index , optics , phosfos , core (optical fiber) , coating , atmospheric temperature range , fiber , optical fiber , optoelectronics , graded index fiber , fiber optic sensor , composite material , physics , meteorology

A 3-dimensional physical model was developed to relate the wavelength shifts resulting from temperature changes of fiber Bragg gratings (FBGs) to the thermal expansion coefficients, Young's moduli of optical fibers, and thicknesses of coating polymers. Using this model the Bragg wavelength shifts were calculated and compared with the measured wavelength shifts of FBGs with various coating thickness for a finite temperature range. There was a discrepancy between the calculated and measured wavelength shifts. This was attributed to the refractive index change of the fiber core by the thermally induced radial pressure. To further investigate the pressure effects, a small diametric load was applied to a FBG and Bragg wavelength shifts were measured over a temperature range of 4.2 to 300K.

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