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Fiber Optic Fabry-Perot Current Sensor Integrated with Magnetic Fluid Using a Fiber Bragg Grating Demodulation.

Xia J, Wang Q, Liu X, Luo H - Sensors (Basel) (2015)

Bottom Line: An optical fiber current sensor based on Fabry-Perot interferometer using a fiber Bragg grating demodulation is proposed.The corresponding reflective power of the FBG will change with different external current intensity, due to the shift on the interference spectrum of the F-P interferometer.Experimental results show that an optimal sensitivity of 0.8522 nw/A and measurement resolution of 0.001 A is obtained with a FBG at 1550 nm with 99% reflectivity.

View Article: PubMed Central - PubMed

Affiliation: Academy of Ocean Science and Engineering, National University of Defense Technology, Changsha 410073, China. blovexiaji@163.com.

ABSTRACT
An optical fiber current sensor based on Fabry-Perot interferometer using a fiber Bragg grating demodulation is proposed. Magnetic fluid is used as a sensitive medium in fiber optical Fabry-Perot (F-P) cavity for the optical characteristic of magnetic-controlled refractive index. A Fiber Bragg grating (FBG) is connected after the F-P interferometer which is used to reflect the optical power at the Bragg wavelength of the interference transmission spectrum. The corresponding reflective power of the FBG will change with different external current intensity, due to the shift on the interference spectrum of the F-P interferometer. The sensing probe has the advantages of convenient measurement for its demodulation, low cost and high current measurement accuracy on account of its sensing structure. Experimental results show that an optimal sensitivity of 0.8522 nw/A and measurement resolution of 0.001 A is obtained with a FBG at 1550 nm with 99% reflectivity.

No MeSH data available.


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Signals of F-P interference with cavity length of 20 μm.
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sensors-15-16632-f003: Signals of F-P interference with cavity length of 20 μm.

Mentions: By simulation, the optimal length of F-P cavity was obtained as 20 μm in the maximum range of refractive index of MF. It is shown in Figure 3.


Fiber Optic Fabry-Perot Current Sensor Integrated with Magnetic Fluid Using a Fiber Bragg Grating Demodulation.

Xia J, Wang Q, Liu X, Luo H - Sensors (Basel) (2015)

Signals of F-P interference with cavity length of 20 μm.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4541897&req=5

sensors-15-16632-f003: Signals of F-P interference with cavity length of 20 μm.
Mentions: By simulation, the optimal length of F-P cavity was obtained as 20 μm in the maximum range of refractive index of MF. It is shown in Figure 3.

Bottom Line: An optical fiber current sensor based on Fabry-Perot interferometer using a fiber Bragg grating demodulation is proposed.The corresponding reflective power of the FBG will change with different external current intensity, due to the shift on the interference spectrum of the F-P interferometer.Experimental results show that an optimal sensitivity of 0.8522 nw/A and measurement resolution of 0.001 A is obtained with a FBG at 1550 nm with 99% reflectivity.

View Article: PubMed Central - PubMed

Affiliation: Academy of Ocean Science and Engineering, National University of Defense Technology, Changsha 410073, China. blovexiaji@163.com.

ABSTRACT
An optical fiber current sensor based on Fabry-Perot interferometer using a fiber Bragg grating demodulation is proposed. Magnetic fluid is used as a sensitive medium in fiber optical Fabry-Perot (F-P) cavity for the optical characteristic of magnetic-controlled refractive index. A Fiber Bragg grating (FBG) is connected after the F-P interferometer which is used to reflect the optical power at the Bragg wavelength of the interference transmission spectrum. The corresponding reflective power of the FBG will change with different external current intensity, due to the shift on the interference spectrum of the F-P interferometer. The sensing probe has the advantages of convenient measurement for its demodulation, low cost and high current measurement accuracy on account of its sensing structure. Experimental results show that an optimal sensitivity of 0.8522 nw/A and measurement resolution of 0.001 A is obtained with a FBG at 1550 nm with 99% reflectivity.

No MeSH data available.


Related in: MedlinePlus