期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 26, 期 3, 页码 239-241出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2013.2291298
关键词
Refractive index sensor; focused ion beam; singlemode-multimode-singlemode; compact size
资金
- Irish Research Council for Science, Engineering and Technology
- Marie-Curie Actions under FP7 Program
- Royal Society for the University Research Fellowship
A compact singlemode-multimode-singlemode fiber tip (SMST) refractive index sensor is demonstrated. Focused ion beam milling is exploited to have a clean fiber tip cut which is then coated by a layer of gold to increase reflection. An average sensitivity of 265 nm/RIU and a resolvable index change of 3.77 x 10(-5) are obtained experimentally with a similar to 2.94 mu m diameter SMST. Because of its compactness, ease of fabrication, linear response, good sensitivity, easy connectivity to other in-fiber optical components, and low cost, this refractometer could find various applications in chemical and biological sensing.
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