Graphene-coated tilted fiber-Bragg grating for enhanced sensing in low-refractive-index region.
Graphene-coated tilted fiber-Bragg grating for enhanced sensing in low-refractive-index region.
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DOI：
10.1364/ol.40.003994
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发表时间：
2015-09
期刊：
影响因子：
3.6
通讯作者：
B. Jiang;Xin Lu;Xuetao Gan;M. Qi;Yadong Wang;Lei Han;D. Mao;Wending Zhang;Z. Ren;Jianlin Zhao
中科院分区：
文献类型：
--
作者：
B. Jiang;Xin Lu;Xuetao Gan;M. Qi;Yadong Wang;Lei Han;D. Mao;Wending Zhang;Z. Ren;Jianlin Zhao
提出并实验验证了一种通过石墨烯涂层的集成，将倾斜光纤布拉格光栅（TFBG）的敏感窗口扩展到低折射率区域的方法。TFBG和石墨烯涂层的包层模式之间的耦合导致包层模式包络的明显修改，这提供了依赖于石墨烯的复折射率的敏感区域。将石墨烯涂覆的TFBG与各种水溶液相互作用，我们观察到在1-1.428的低折射率区域中强烈增强的灵敏度，这是未负载的TFBG的灵敏度的约10倍。石墨烯包覆的TFBG在生物化学传感窗口中呈现出巨大的潜力。
We propose and experimentally demonstrate a method to significantly extend the sensitive window of tilted fiber-Bragg grating (TFBG) into low-refractive-index region with the integration of graphene coating. The coupling between cladding modes of TFBG and graphene coating results in an obvious modification of the cladding-mode envelope, which provides a sensitive regime relying on graphene's complex refractive index. Interacting the graphene-coated TFBG with various aqueous solutions, we observe strongly enhanced sensitivity in the low-refractive-index region of 1-1.428, which is about 10-fold extended from that of the unloaded TFBG. The graphene-coated TFBGs present great potentials in the biochemical sensing window.