Magnetic field sensor based on D-shaped long period fiber gratings

Chuen-Lin Tien; Chang-Chou Hwang; Wen-Feng Liu

doi:10.1117/12.837870

23 November 2009 Magnetic field sensor based on D-shaped long period fiber gratings

Chuen-Lin Tien, Chang-Chou Hwang, Wen-Feng Liu

Proceedings Volume 7508, 2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications; 750811 (2009) https://doi.org/10.1117/12.837870
Event: International Conference on Optical Instrumentation and Technology, 2009, Shanghai, China

Abstract

We present a new magnetic field sensor based on D-shaped long-period fiber grating (D-LPFG). Iron thin-film was coated on the polished surface of an LPFG to function as a sensing head. Different levels of magnetic field caused a shift in the grating loss-dip wavelength shift. The sensing section of a D-LPFG causes a change in the effective refractive index both of the core mode and co-propagation cladding modes in response to the different levels of the applied magnetic field. The maximum shift in wavelength of 36 nm was obtained in the case of a magnetic field of 153 kA/m.

Citation Download Citation

Chuen-Lin Tien, Chang-Chou Hwang, and Wen-Feng Liu "Magnetic field sensor based on D-shaped long period fiber gratings", Proc. SPIE 7508, 2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications, 750811 (23 November 2009); https://doi.org/10.1117/12.837870

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