Refractive index sensor based on a microhole in single-mode fiber created by the use of femtosecond laser micromachining.
Refractive index sensor based on a microhole in single-mode fiber created by the use of femtosecond laser micromachining.
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DOI：
10.1364/ol.34.003328
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发表时间：
2009-11
期刊：
影响因子：
3.6
通讯作者：
Ying Wang;D. N. Wang;Minwei Yang;W. Hong;P. Lu
中科院分区：
文献类型：
--
作者：
Ying Wang;D. N. Wang;Minwei Yang;W. Hong;P. Lu
提出了一种基于飞秒激光微加工技术在传统单模光纤上加工微孔的光纤折射率传感器。在1500-1600 nm波长范围内和RI为1.30-1.45的范围内，研究了具有不同直径的微孔的这种器件的透射特性。结果表明，折射率与透过率的关系与纤芯区域微孔的大小密切相关。当微孔直径约为8 μ m，接近纤芯尺寸时，在RI为1.37-1.42的范围内，获得的最高分辨率为6.70 × 10 ~（-5）。在这项工作中开发的光纤RI传感器是易于制造，并可用于实现温度无关的测量。
A compact in-fiber refractive index (RI) sensor is presented that is based on a microhole created in a conventional single-mode fiber by the use of femtosecond laser micromachining. The transmission properties of such a device with a microhole of different diameters have been investigated in the wavelength region of 1500-1600 nm and in the RI range of 1.30-1.45. It is found that the relationship between the transmission and the RI is critically dependent on the size of the microhole in the fiber core region. The highest resolution obtained is 6.70x10(-5), in the RI range of 1.37-1.42, when the microhole diameter is approximately 8 microm, close to the fiber core size. The in-fiber RI sensor developed in this work is easy to fabricate and can be used to implement temperature-independent measurements.