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论文类型：期刊论文

发表时间：2015-08-01

发表刊物：JOURNAL OF LIGHTWAVE TECHNOLOGY

收录刊物：SCIE、EI、Scopus

卷号：33

期号：15

页面范围：3351-3356

ISSN号：0733-8724

关键字：Bent fiber; dual-channel; fiber optic sensor; Mach-Zehnder interferometer

摘要：We report a novel fiber-optic interferometer based on Mach-Zehnder interferometer (MZI) from a bent single-mode fiber (SMF) and experimentally demonstrated that it can be used as a fiber-optic refractometer. The interferometer has a simple structure including a standard SMF with a bare fiber semicircular bending region of a given diameter. A fiber MZI is formed by the different optical paths taken by the core and cladding modes from the designed bending fiber structure. We also realize a dual-channel interferometer by using a 9 and 11 mm bending diameter fiber structure and measure the refractive index of the ambient environment by monitoring the wavelength shift of the resonance dips in its transmission spectrum. Additionally, we investigate the relationship between the wavelength shifts of the resonant dips with temperature changes. This dual-channel interferometer can be potentially used for simultaneous measurement of dual chemical parameters.