Journal ArticleDOI
Simultaneous measurement of strain and temperature using interferometrically interrogated fiber Bragg grating sensors
TLDR
In this paper, the potential of different fiber Bragg grating pairs for simultaneous sensing of strain and temperature is analyzed, and the performance of the proposed technique in simultaneous measurement of temperature and strain is experimentally demonstrated and resolutions of ± 2.5° c/?Hz and ± 26??/?Hz are obtained for a fiber with birefringence of B = 5.5x 10-4.4.Abstract:
The potential of different fiber Bragg grating pairs for simultaneous sensing of strain and temperature is analyzed. We demonstrate that interferometric interrogation of a fiber grating written in bow-tie fiber enables strain and temperature to be simultaneously determined. This is achieved by independent measurement of the shift in the wavelengths of the reflected light from the grating components along the fast and the slow axes of the hi-bi fiber. A detailed theoretical analysis is presented that includes the basic sensing principle, sensor design and demodulation scheme. The performance of the proposed technique in simultaneous measurement of temperature and strain is experimentally demonstrated and resolutions of ± 2.5° c/?Hz and ± 26 ??/?Hz are obtained for a fiber with birefringence of B = 5.5x 10-4.read more
Citations
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Journal ArticleDOI
Fibre Bragg gratings in structural health monitoring—Present status and applications
Mousumi Majumder,Tarun Kumar Gangopadhyay,Ashim Kumar Chakraborty,Kamal Dasgupta,D.K. Bhattacharya +4 more
TL;DR: The recent research and development activities in structural health monitoring using FBG sensors have been critically reviewed, highlighting the areas where further work is needed.
Journal ArticleDOI
Optical Fiber Sensors for Aircraft Structural Health Monitoring
Iker García,Joseba Zubia,Gaizka Durana,Gotzon Aldabaldetreku,María Asunción Illarramendi,Joel Villatoro +5 more
TL;DR: Fiber Bragg gratings have been analyzed in detail, because they have proved to constitute the most promising technology in this field, and two different alternatives for strain measurements are also described.
Journal ArticleDOI
On the possible use of optical fiber Bragg gratings as strain sensors for geodynamical monitoring
TL;DR: In this paper, the authors reviewed the achievements about the fiber Bragg gratings (FBG) as a strain and temperature sensor and described the potential applications of FBG sensors for applications in the field of geophysics and its expected development in the near future.
Journal ArticleDOI
Applications of Fiber Optic Grating Technology to Multi-Parameter Measurement
TL;DR: In this paper, a review of approaches reported in the literature for multi-parameter measurement relying on fiber grating technology is presented, and the particular case of temperature/strain simultaneous measurement is addressed in further detail, as well as the techniques and sensing heads for temperatureindependent strain measurement.
Journal ArticleDOI
Simultaneous strain and temperature measurements with fiber Bragg grating written in novel Hi-Bi optical fiber
TL;DR: In this article, a fiber Bragg grating was written in a quasi-rectangle high birefringence fiber by the phase mask method, and two Bragg wavelengths corresponding to the fast and slow-axis modes were observed in this grating, and a wavelength splitting as large as 0.765 nm was obtained.
References
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Journal ArticleDOI
High pressure H/sub 2/ loading as a technique for achieving ultrahigh UV photosensitivity and thermal sensitivity in GeO/sub 2/ doped optical fibres
TL;DR: In this article, high pressure "hydrogen loading" has been used to sensitise standard singlemode fibres, resulting in the largest reported UV induced index changes for low GeO/sub 2/ fibres.
Journal ArticleDOI
Discrimination between strain and temperature effects using dual-wavelength fibre grating sensors
TL;DR: In this paper, the spectral properties of two superimposed fiber gratings having different Bragg wavelengths (850 and 1300 nm) with respect to strain and temperature were studied, and it was shown that the ratio of sensitivity at two Bragg wavelength is dependent on strain, which can be used for simultaneous measurement of these parameters.
Journal ArticleDOI
Hybrid fiber Bragg grating/long period fiber grating sensor for strain/temperature discrimination
TL;DR: In this paper, the difference in strain and temperature response of fiber Bragg gratings and a long period fiber grating was used to discriminate between strain induced and temperature induced wavelength shifts.
Journal ArticleDOI
High-resolution fibre-grating based strain sensor with interferometric wavelength-shift detection
TL;DR: In this paper, an unbalanced-interferometer wavelength discriminator was used for the detection of dynamic strain induced wavelength shifts in fiber Bragg grating sensors, which is capable of sub-nanostrain resolution (0.6 ne/√(Hz) at 500 Hz).