High-birefringence fiber loop mirror sensor using a WDM fused fiber coupler.
High-birefringence fiber loop mirror sensor using a WDM fused fiber coupler.
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DOI：
10.1364/ol.38.002927
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发表时间：
2013-08
期刊：
影响因子：
3.6
通讯作者：
D. J. Passos;M. Marques;O. Frazão
中科院分区：
文献类型：
--
作者：
D. J. Passos;M. Marques;O. Frazão
An intensity-based highly birefringent (Hi-Bi) fiber loop mirror (FLM) sensor is proposed which uses a wavelength-division multiplexing (WDM) fiber coupler. The effect of integrating the WDM coupler in a FLM configuration is first studied. A section of Hi-Bi (bow-tie) fiber of length 0.26 m is then placed in the fiber loop, making the spectral response of the device simultaneously dependent on the Hi-Bi fiber section and WDM coupler characteristics. When strain is applied to the sensing head, the spectral signal is modulated in amplitude, in contrast with the conventional Hi-Bi FLM sensors in which there are wavelength shifts. The sensor was characterized in strain and a sensitivity of (-2.2±0.4)×10(-3) με(-1) for a range of 300 με was attained. The self-referenced character of the sensor is noted.
