High resolution temperature insensitive interrogation technique for FBG sensors

Wu, Qiang; Semenova, Yuliya; An, Sun; Wang, Pengfei; Farrell, Gerald

doi:10.1016/j.optlastec.2009.11.005

Cited by 39 publications

(16 citation statements)

References 24 publications

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“…When FBG is loaded under complex temperature field [3] [ 4] , gratings in different positions inside it will change in a varying manner, changing it into a chirped FBG (CFBG) [5] . Compared with the bandwidth of different pitchs, the gap between their reflective spectrums is smaller, so all spectrums will overlap with each other to form a whole broadening reflective spectrum [6][7] [8] .…”

Section: Theories Analysismentioning

confidence: 99%

A demodulation method of Temperature-Spectrum width based on Chirped fiber grating

Chen

Zhi-Quan

et al. 2016

MATEC Web of Conferences

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Abstract. Based on spectral reflection characteristics of chirped FBGs, a demodulation method for complex temperature fields is proposed in this paper. Relationships between the reflective spectrums and the temperatures are investigated through theoretical analyses. Testing results are acquired from a FBG sensing model which is designed according to the newly-developed method. A simulation to get the relationships between reflective spectrums and temperatures is set which shows that this demodulation method is feasible and its demodulation precision is beyond +/-1°C. The method provides a new method for analyzing complex temperature fields.

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Section: Theories Analysismentioning

confidence: 99%

A demodulation method of Temperature-Spectrum width based on Chirped fiber grating

Chen

Zhi-Quan

et al. 2016

MATEC Web of Conferences

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“…We dropped the losses effect by fiber couplers. Therefore, the interferometric output signal in steady state is given by (3) Where (4) The amplitude depends on and the responsivity of the photodetector [7]. As a strain is applied the phase shifts change and this is clearly observable in the intensity detected.…”

Section: Introductionmentioning

confidence: 99%

Micrometric displacement sensor based on the strain of a fiber Bragg grating with heterodyne detection of intensity in a Mach-Zehnder interferometer.

González

Álvarez

Sandoval.

2017

J. Phys.: Conf. Ser.

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and G E Sandoval. hely.gonzalez@ccadet.unam.mxAbstract. This paper describes the implementation and characterization of a displacement sensor according to the strain of a fiber Bragg grating. The system is able to obtain measurements on micrometer scales through heterodyne detection of intensity in a Mach Zehnder interferometry in fiber optic. For the displacement characterization, the fiber Bragg grating was attached from one end meanwhile at the other end a tension was induced by a high precision rotation mount. Experimental results are presented for which varying the angular displacement we obtain a linear response in the amplitude of the intensity, determining a sensitivity of 0.77 pW/µm with a displacement size of 48.80 µm in a dynamic range from 0 µm to 488 µm.

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“…Recently, we have proposed the use of a specially designed singlemode-multimode-single-mode (SMS) fiber structure [6] or an edge filter-based FBG interrogation system [7,8] to compensate temperature-induced errors for a FBG strain sensor. As a SMS fiber structure is much easier to fabricate than a FBG and is also sensitive to both strain and temperature, it will be more cost effective to use a SMS fiber structure to substitute for a FBG strain sensor for simultaneous measurements of strain and temperature.…”

Section: Introductionmentioning

confidence: 99%

Single‐mode–multimode–single‐mode fiber structures for simultaneous measurement of strain and temperature

Semenova

Hatta

et al. 2011

Micro & Optical Tech Letters

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This article presents two related techniques for the simultaneous measurement of strain and temperature: (1) using two single-mode-multimode-single-mode (SMS) fiber structures accompanied with an optical spectral analyzer (OSA); (2) using three SMS fiber structures and a ratiometric power measurement system. Experimental results show that (1) the technique accompanied with an OSA has a resolution of 1.64 le for strain in the range from 0 to 1000 le and 0.11 C for temperature and (2) the technique based on ratiometric system offers a resolution of better than 2 le for strain measurements in the range from 0 to 1000 le and a resolution better than 0.84 C for temperature.

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High resolution temperature insensitive interrogation technique for FBG sensors

Cited by 39 publications

References 24 publications

A demodulation method of Temperature-Spectrum width based on Chirped fiber grating

A demodulation method of Temperature-Spectrum width based on Chirped fiber grating

Micrometric displacement sensor based on the strain of a fiber Bragg grating with heterodyne detection of intensity in a Mach-Zehnder interferometer.

Single‐mode–multimode–single‐mode fiber structures for simultaneous measurement of strain and temperature

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