Fabrication of elliptic microfibers with CO2 laser for high-sensitivity refractive index sensing.
Fabrication of elliptic microfibers with CO2 laser for high-sensitivity refractive index sensing.
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DOI：
10.1364/ol.39.003531
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发表时间：
2014-06
期刊：
影响因子：
3.6
通讯作者：
Lipeng Sun;Jie Li;Shuai Gao;Long Jin;Yang Ran;B. Guan
中科院分区：
文献类型：
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作者：
Lipeng Sun;Jie Li;Shuai Gao;Long Jin;Yang Ran;B. Guan
我们提出了一种方便的方法来实现高双折射（HiBi）椭圆微纤维通过使用CO2激光加工和火焰刷技术。通过优化工艺，实验获得了高达2.10×10（-2）的高双折射。特别是，在偏振Sagnac干涉仪作为折射率（RI）传感器，测量的积极和异常的负灵敏度，取决于HiBi微纤维的几何变量。在RI=1.35887附近，最大RI灵敏度为195，348 nm/RI单位，据我们所知，这是所报道的微纤维器件中最高的。
We propose a convenient method for achieving highly birefringent (HiBi) elliptic microfibers by use of the CO2-laser machining and the flame-brushing techniques. With optimization of fabrication process, a high birefringence of up to 2.10×10(-2) is experimentally obtained. Especially, within a polarization Sagnac interferometer acting as a refractive index (RI) sensor, both positive and abnormal negative sensitivity is measured, dependent on the geometrical variables of the HiBi microfiber. The maximum RI sensitivity is ∼195,348 nm/RI-unit around RI=1.35887, which is the highest among the microfiber devices as reported, to our knowledge.