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论文类型：期刊论文

发表时间：2014-11-01

发表刊物：OPTICAL ENGINEERING

收录刊物：SCIE、EI、Scopus

卷号：53

期号：11

ISSN号：0091-3286

关键字：fiber optics; fiber optic sensors; photonic crystal fibers; microstructure devices; refractive index

摘要：We report two fiber multiple-mode interferometers formed in photonic crystal fiber (PCF). The interference between the core and the cladding modes of a PCF is utilized. We use two methods to form a coupling point, and the cladding modes are excited from the fundamental core mode. One method is blowing compressed gas into the air holes and discharging at the coupling point; the air holes will expand due to gas expansion in the discharge process. Similarly, the other is discharging at the coupling point after the air is exhausted from the air holes, and the holes will contract during the process. By making another coupling point at a different location along the fiber, the proposed PCF interferometers are implemented. Experimental results show that the sensitivities of the two devices can achieve 1.54 and 1.45 nm for a 0.01 refractive index change. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)