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Improved uniformity of sensor gratings in offset core fibers with fiber lensing mitigation

机译:减轻光纤透镜影响,改善了偏移芯光纤中传感器光栅的均匀性

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We report on improved spatial uniformity of sensor grating arrays in offset and multicore fibers. We show improvement over conventional side writing in such fibers, in which cores offset from the center of the fiber exhibit grating strength variations due to lensing at the fiber surface. Such strength variations can degrade the performance of sensing systems that rely on continuous scattering from offset cores along a fiber. Our improved system uses multicore fibers whose coating is UV transparent and applies index matching materials to mitigate lensing aberrations. We show that it is capable of continuously inscribing gratings over any length of fiber.
机译:我们报告了偏移和多芯光纤中传感器光栅阵列改善的空间均匀性。我们显示了这种纤维相对于常规侧写的改进,其中,偏离纤维中心的纤芯由于纤维表面的透镜作用而显示出光栅强度变化。这种强度变化会降低传感系统的性能,该传感系统依赖于偏移光纤沿光纤的连续散射。我们改进的系统使用多芯光纤,其涂层是紫外线透明的,并使用折射率匹配的材料来减轻透镜像差。我们证明了它能够在任何长度的光纤上连续刻写光栅。

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