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Comparative study of fiber optic liquid level sensors based on long-period fiber gratings with dif ferent doping concentrations
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作者 barerem-melgueba mao 魏一振 周斌 《Chinese Optics Letters》 SCIE EI CAS CSCD 2012年第5期7-10,共4页
The performances of two liquid level sensors based on long-period fiber gratings are studied. The long- period gratings (LPGs) have similar characteristics (length and period), but are fabricated with two pho- tos... The performances of two liquid level sensors based on long-period fiber gratings are studied. The long- period gratings (LPGs) have similar characteristics (length and period), but are fabricated with two pho- tosensitive B-Ge co-doped fibers with different dopant concentrations. We investigate the temperature sensitivities of LPGs and exploit their refractive index sensitivity to implement liquid level measurement. By controlling fiber parameters, such as the dopant concentrations, the measurement sensitivity of a LPG- based fiber optic liouid level sensor can be improved. 展开更多
关键词 Diffraction gratings Fiber optic sensors GERMANIUM Semiconductor doping
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