Bock W J, Eftimov T A
Opt Lett. 1993 Nov 15;18(22):1979-81. doi: 10.1364/ol.18.001979.
The sensitivity to hydrostatic pressure, temperature, and strain of elliptical-core, D-shaped, bow-tie highly birefringent fibers is experimentally investigated. Both polarimetric and polarization sensitive LP(01)-LP(11) intermodal interferometric responses are studied. The sensitivities are expressed in terms of the experimental parameters T(x,j) describing a 2pi phase shift in the cosine response. It is found that bow-tie fibers exhibit a linear response to all the studied external perturbations except for the polarimetric response of the fundamental mode to temperature, while elliptical-core and D-shaped fibers are characterized by a nonlinear sensitivity to both temperature and hydrostatic pressure. The application to fiber-optic sensors of each type of fiber is discussed.
对椭圆芯、D形、蝴蝶结形高双折射光纤的静水压力、温度和应变敏感性进行了实验研究。研究了偏振和偏振敏感的LP(01)-LP(11)模间干涉响应。灵敏度用描述余弦响应中2π相移的实验参数T(x,j)表示。结果发现，除了基模对温度的偏振响应外，蝴蝶结形光纤对所有研究的外部扰动都表现出线性响应，而椭圆芯和D形光纤对温度和静水压力都具有非线性灵敏度。讨论了每种类型光纤在光纤传感器中的应用。
