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首页> 外文期刊>Optics Letters >High-birefringence fiber loop mirror sensor using a WDM fused fiber coupler
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High-birefringence fiber loop mirror sensor using a WDM fused fiber coupler

机译:使用WDM熔融光纤耦合器的高双折射光纤环形镜传感器

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摘要

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.
机译:提出了一种基于强度的高双折射(Hi-Bi)光纤环形镜(FLM)传感器,该传感器使用波分复用(WDM)光纤耦合器。首先研究了将WDM耦合器集成到FLM配置中的效果。然后将一段长度为0.26 m的Hi-Bi(蝶形)光纤放置在光纤环路中,从而使设备的光谱响应同时取决于Hi-Bi光纤截面和WDM耦合器特性。当应变施加到感测头上时,频谱信号的幅度被调制,这与其中波长偏移的常规Hi-Bi FLM传感器相反。该传感器具有应变特性,在300με范围内的灵敏度为(-2.2±0.4)×10〜(-3)με〜(-1)。记录传感器的自参考特征。

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