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Performance of low-cost few-mode fiber Bragg grating sensor systems: polarization sensitivity and linearity of temperature and strain response

机译:低成本少模光纤布拉格光栅传感器系统的性能:极化灵敏度以及温度和应变响应的线性

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We evaluate whether 850 nm fiber Bragg grating (FBG) sensor systems can use low-cost 1550 nm telecom fibers; in other words, how detrimental the influence of higher-order modes is to the polarization stability and linearity of the strain and temperature response. We do this by comparing polarization sensitivity of a few-mode 850 nm FBG sensor to a strictly single-mode 850 nm FBG sensor system using 850 nm single-mode fibers. We also compare the performance of the FBGs in strain and temperature tests. Our results show that the polarization stability and the linearity of the response degrade due to the presence of the higher-order modes. We demonstrate that, by using simple coiling of the 1550 nm fiber, one can regain the performance of the few-mode system and make it usable for high precision measurements. (C) 2016 Optical Society of America
机译:我们评估850 nm光纤布拉格光栅(FBG)传感器系统是否可以使用低成本的1550 nm电信光纤。换句话说,高阶模的影响对应变和温度响应的偏振稳定性和线性有多有害。我们通过将少数模式850 nm FBG传感器与使用850 nm单模光纤的严格单模850 nm FBG传感器系统的偏振灵敏度进行比较,来实现此目的。我们还比较了FBG在应变和温度测试中的性能。我们的结果表明,由于存在高阶模,偏振稳定性和响应的线性下降。我们证明,通过使用1550 nm光纤的简单绕制,可以恢复少数模式系统的性能,并使其可用于高精度测量。 (C)2016美国眼镜学会

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