Using induced UV attenuation across a twisted fiber asymmetric core drawn from a 3D printed preform, linear fiber Bragg gratings (FBGs) are produced on one side of the core. By removing the twist, a helical grating with a period matching the twist rate is produced. Balancing the rate with the polarization beat length in a form birefringent fiber allows the production of a combined rocking filter and FBG device with tunable properties. Direct observation of the fiber grating dispersion within the rocking filter rejection band is possible.

中文翻译：

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螺旋分布反馈光纤布拉格光栅和3D打印的预成型拉拔光纤中的摇摆滤波器

使用从3D打印的预成型坯中拉出的扭曲纤维非对称纤芯引起的紫外线衰减，在纤芯的一侧会产生线性光纤布拉格光栅（FBG）。通过消除扭曲，产生了周期与扭曲率匹配的螺旋光栅。在双折射光纤中用偏振拍长平衡速率，可以生产出具有可调特性的组合式摇摆滤波器和FBG器件。可以直接观察在摇摆滤波器抑制带内的光纤光栅色散。