Fiber-optic Bragg grating strain sensor with drift-compensated high-resolution interferometric wavelength-shift detection
AD Kersey, TA Berkoff, WW Morey - Optics letters, 1993 - opg.optica.org
AD Kersey, TA Berkoff, WW Morey
Optics letters, 1993•opg.optica.orgThe operation of a fiber Bragg grating strain sensor system that uses interferometric
determination of strain-induced wavelength shifts and incorporates a reference channel to
compensate for random thermal-induced drift in the output is described. This system is
shown to be capable of resolving sub-μstrain changes in the quasi-static strain applied to a
grating and has a resolution of~ 6× 10^− 3μstrain/Hz at a strain perturbation frequency of 1
Hz.
determination of strain-induced wavelength shifts and incorporates a reference channel to
compensate for random thermal-induced drift in the output is described. This system is
shown to be capable of resolving sub-μstrain changes in the quasi-static strain applied to a
grating and has a resolution of~ 6× 10^− 3μstrain/Hz at a strain perturbation frequency of 1
Hz.
The operation of a fiber Bragg grating strain sensor system that uses interferometric determination of strain-induced wavelength shifts and incorporates a reference channel to compensate for random thermal-induced drift in the output is described. This system is shown to be capable of resolving sub-μstrain changes in the quasi-static strain applied to a grating and has a resolution of ~6 × 10^−3μstrain/Hz at a strain perturbation frequency of 1 Hz.
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