Habel Joé, Boilard Tommy, Frenière Jean-Simon, Trépanier François, Bernier Martin
Center for Optics, Photonics, and Lasers (COPL), Université Laval, Québec, QC G1K 7P4, Canada.
TeraXion Inc., Québec, QC G1P 4S8, Canada.
Sensors (Basel). 2017 Nov 2;17(11):2519. doi: 10.3390/s17112519.
Type I fiber Bragg gratings (FBG) written through the coating of various off-the-shelf silica fibers with a femtosecond laser and the phase-mask technique are reported. Inscription through most of the common coating compositions (acrylate, silicone and polyimide) is reported as well as writing through the polyimide coating of various fiber cladding diameters, down to 50 µm. The long term annealing behavior of type I gratings written in a pure silica core fiber is also reported as well as a comparison of the mechanical resistance of type I and II FBG. The high mechanical resistance of the resulting type I FBG is shown to be useful for the fabrication of various distributed FBG arrays written using a single period phase-mask. The strain sensing response of such distributed arrays is also presented.
报道了通过飞秒激光和相位掩膜技术在各种现成的石英光纤涂层上写入的I型光纤布拉格光栅（FBG）。还报道了通过大多数常见涂层成分（丙烯酸酯、硅酮和聚酰亚胺）进行的写入，以及通过各种光纤包层直径（低至50μm）的聚酰亚胺涂层进行的写入。还报道了在纯石英芯光纤中写入的I型光栅的长期退火行为，以及I型和II型FBG的机械抗性比较。结果表明，所得I型FBG的高机械抗性对于使用单周期相位掩膜写入的各种分布式FBG阵列的制造很有用。还介绍了这种分布式阵列的应变传感响应。
