High-Order-Tilted Fiber Bragg Gratings With Superposed Refractive Index Modulation
High-Order-Tilted Fiber Bragg Gratings With Superposed Refractive Index Modulation
复制标题
具有叠加折射率调制的高阶倾斜光纤布拉格光栅
DOI：
10.1109/jphot.2017.2784818
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发表时间：
2017
影响因子：
2.4
通讯作者：
Hong-Bo Sun
中科院分区：
文献类型：
--
作者：
Xuan-Yu Zhang;Chao Chen;Yong-Sen Yu;Wei-Hua Wei;Qi Guo;Yong-Yi Chen;Xing Zhang;Li Qin;Yong-Qiang Ning;Hong-Bo Sun
报道了一种利用飞秒激光器和位相掩模写入的叠加折射率调制的高阶倾斜光纤布拉格光栅(HO-TFBG)。这种叠加结构是由±1级脉冲干涉和±1级脉冲与零级脉冲的热积累效应共同作用实现的。对于间距为3.33μm的相位掩模，在600-1700 nm波长范围内有11组高阶Bragg共振和包层模共振组，其携带的信息量比纯两束干涉写入的Ho-TFBG增加了一倍。结果表明，包层模共振对周围阻抗、轴向应变和温度的敏感性随光栅阶数的增加而减小。
A high-order-tilted fiber Bragg gratings (HO-TFBG) with superposed refractive index (RI) modulation written by a femtosecond laser and a phase mask has been demonstrated. The superposed grating structure is realized by the combined action of the pure ±1 order pulses interference and the heat accumulation effect of ±1 order and zero-order pulses. For the phase mask with the pitch of 3.33 μm, there are 11 groups of high-order Bragg resonance and cladding mode resonances sets in the wavelength range of 600–1700 nm, the information carried by which is doubled compared to the HO-TFBG written by pure two beams interference. It demonstrates that the sensitivities of the cladding mode resonances sets to surrounding RI, axial strain and temperature decrease with the increase of the grating order.