2018
DOI: 10.3390/s18061895
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Experimental Demonstration of Low-Uncertainty Calibration Methods for Bragg Grating Interrogators

Abstract: In this paper we propose and demonstrate two alternative methods for the high-precision calibration of fiber Bragg grating (FBG) interrogators. The first method is based on the direct comparison between the wavelength measurements of the interrogator under test and a calibrated wavemeter, while analyzing a simulated symmetric Bragg grating constructed by a tunable filter and a fiber mirror. This first method is applicable to most commercial systems but presents an uncertainty limited by the spectral width and … Show more

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Cited by 3 publications
(3 citation statements)
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“…The spectral range of measurements with the use of matched filter systems is limited by the FWHM of the sensor and filter structures, as well as the spectral shift between them. The wavelength measurement range of commercially available interrogators is quite wide and reaches up to 100 nm [ 30 ]. In practice, the measurement of physical quantities such as temperature or strain is limited by the material properties of the optical fibers used to construct the sensor.…”
Section: Analysis Of the Obtained Results And Discussionmentioning
confidence: 99%
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“…The spectral range of measurements with the use of matched filter systems is limited by the FWHM of the sensor and filter structures, as well as the spectral shift between them. The wavelength measurement range of commercially available interrogators is quite wide and reaches up to 100 nm [ 30 ]. In practice, the measurement of physical quantities such as temperature or strain is limited by the material properties of the optical fibers used to construct the sensor.…”
Section: Analysis Of the Obtained Results And Discussionmentioning
confidence: 99%
“…FBG matched filter systems allow to obtain a frequency response of about 500 kHz and a wavelength resolution of 0.3 pm [ 16 ]. Commercial integrators achieve a maximum frequency of 5 kHz and typically 1 kHz [ 30 ]. In our case, as a result of repeated measurements, we achieved a relative resolution of 0.5 × 10 −3 , which in the case of a measuring range of 1.2 nm means a resolution of 0.6 pm and a temperature measurement resolution of 0.1 °C in the range from 10 °C to 120 °C.…”
Section: Analysis Of the Obtained Results And Discussionmentioning
confidence: 99%
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