Resolving cross sensitivity of fiber Bragg gratings with different polymeric coatings

Lu, Ping; Men, Liqiu; Chen, Qiying

doi:10.1063/1.2919796

Cited by 42 publications

(20 citation statements)

References 19 publications

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“…This value is almost two times larger than the temperature sensitivity of bare fiber. Therefore, it is essential to carry out temperature compensation to overcome the cross sensitivity effect by, for example, employing other FBG sensor which only sensitive to temperature [19][20]. …”

Section: B Time and Temperature Responsementioning

confidence: 99%

Characterization of fiber Bragg grating sensor for pH measurement

Yulianti

Supa’at

Idrus

2014

2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics

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A wavelength modulated optical pH sensor is presented. The sensor comprises fiber Bragg grating (FBG) coated with pH sensitive hydrogel. The sensing principle relies on wavelength shifts resulted from the induced strain on the FBG due to mechanical expansion of the hydrogel. The pH response of the sensor was simulated using free energy function by employing finite element method. Experimental work was carried out to investigate the pH response, time response, and temperatures cross sensitivity of the sensor. The results show that the sensor has a good reversibility and provides linear response in pH range of 5 to 7 with sensitivity of 0.114nm/pH unit.

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Section: B Time and Temperature Responsementioning

confidence: 99%

Characterization of fiber Bragg grating sensor for pH measurement

Yulianti

Supa’at

Idrus

2014

2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics

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“…Alternatively, another fiber grating laser can be embedded in the same polymer at a different location which enables different pressure and temperature sensitivities. The pressure and temperature can be simultaneously measured by resolving a coefficient matrix, similar with previous works proposed for wavelength-encoded fiber grating sensors [10].…”

Section: Experiments and Discussionmentioning

confidence: 98%

Highly Sensitive Hydrostatic Pressure Sensing With an Embedded Dual-Polarization Fiber Grating Laser

Jin

Quan

Tan

et al. 2012

IEEE Photon. Technol. Lett.

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In this letter, we propose and demonstrate a highly sensitive hydrostatic-pressure sensor based on a dual-polarization fiber grating laser. The sensor is fabricated by embedding such a laser into a polymer with a steel rod. Due to the significant difference in elastic property, a nonuniform stress field over the package is induced by the applied pressure and an additional intracavity birefringence is produced. The amplitude of the pressure can be measured by monitoring the beat frequency between the orthogonal polarization modes. The sensitivity reaches 0.217 GHz/MPa, 108.5 times higher than that of a bare fiber grating laser. Considering the fluctuation of the beat frequency of ∼0.3 MHz, the resolution of the sensor is about 1.4 kPa, within the range of 0-13 MPa.

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“…One drawback of FBG sensors is their cross sensitivity to both strain and temperature, which requires special techniques to compensate one of the parameters when measuring the other. Several methods have already been proposed to overcome this drawback, some of which involved the use of a single FBG sensor for the simultaneous measurement of temperature and strain [18][19][20] . In this study, two FBG sensors were used to resolve this drawback and setup details are discussed further in the ensuing section.…”

Section: Fiber Bragg Grating Sensorsmentioning

confidence: 99%

Characterization of different water/powder ratios of dental gypsum using fiber Bragg grating sensors

et al. 2011

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The impact of five different water/powder (w/p) ratios in the characterization of high strength dental stone was evaluated, since the recommendations of the gypsum' manufacturers are not always correctly followed by the dental prosthesis technicians. Fiber Bragg grating (FBG) sensors were used to measure the setting expansion and temperature variation which occurred during the setting reaction for each w/p ratio, as well as the thermal expansion coefficient. Thick mixtures with low w/p ratios had more crystals impinging upon each other during crystal growth, resulting in more expansion and more heat released. This thermal behavior was only achieved to w/p ratios within the manufacturer-recommended mixing ratio range. The results also revealed the existence of boundary condition; this corresponding to the limit of the mixing ratio recommended by the gypsum' manufacturer. Data provided in this study are particularly important for dental technicians with a view to attaining the best results in accuracy of fit for their prosthetic works.

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Resolving cross sensitivity of fiber Bragg gratings with different polymeric coatings

Cited by 42 publications

References 19 publications

Characterization of fiber Bragg grating sensor for pH measurement

Characterization of fiber Bragg grating sensor for pH measurement

Highly Sensitive Hydrostatic Pressure Sensing With an Embedded Dual-Polarization Fiber Grating Laser

Characterization of different water/powder ratios of dental gypsum using fiber Bragg grating sensors

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