Wang Tao, Liu Kun, Jiang Junfeng, Xue Meng, Chang Pengxiang, Liu Tiegen
Opt Express. 2017 Jun 26;25(13):14900-14909. doi: 10.1364/OE.25.014900.
We proposed and fabricated a tilted moiré FBG (TMFBG), whose grating section was made up of two consecutive scribed TFBGs. By adjusting the Bragg wavelengths and the tilt angles of the two TFBGs, the two cladding mode combs of the transmission spectrum are non-overlapped. When the TMFBG was used for refractive index detection, its resolution can reach 2 × 10 RIU, which is an order of magnitude higher than that of a single TFBG. And this result also has a good performance of temperature-insensitivity.
我们提出并制作了一种倾斜莫尔光纤布拉格光栅（TMFBG），其光栅部分由两个连续刻写的倾斜光纤布拉格光栅组成。通过调整两个倾斜光纤布拉格光栅的布拉格波长和倾斜角度，传输光谱的两个包层模梳不重叠。当TMFBG用于折射率检测时，其分辨率可达2×10^-6 RIU，比单个倾斜光纤布拉格光栅高一个数量级。并且该结果还具有良好的温度不敏感性。
