Bernier M, Trépanier F, Carrier J, Vallée R
Opt Lett. 2014 Jun 15;39(12):3646-9. doi: 10.1364/OL.39.003646.
We report that by using 800 nm femtosecond pulses and the phase-mask technique, first-order fiber Bragg gratings with refractive index modulation in excess of 1×10(-3) can be written through both the acrylate and polyimide coatings of unloaded standard silica fibers without noticeable degradation of mechanical strength. We also demonstrate that the same experimental conditions can be applied for efficient FBG writing through the polyimide coating of pure silica core fibers, opening significant opportunities in the field of fiber sensors.
我们报告称，通过使用800纳米飞秒脉冲和相位掩膜技术，可以在未加载的标准石英光纤的丙烯酸酯和聚酰亚胺涂层上写入折射率调制超过1×10(-3)的一阶光纤布拉格光栅，且不会明显降低机械强度。我们还证明，相同的实验条件可用于通过纯石英芯光纤的聚酰亚胺涂层高效写入光纤布拉格光栅，这为光纤传感器领域带来了重大机遇。
