期刊
OPTICS EXPRESS
卷 22, 期 2, 页码 1680-1686出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.22.001680
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资金
- National Science Foundation of China [11174064, 61308027, 61377090]
- Science & Technology Innovation Commission of Shenzhen [KQCX20120815161444632, JCYJ20130329140017262]
- Distinguished Professors Funding from Shenzhen University and Guangdong Province Pearl River Scholars
We demonstrated a novel fiber in-line Mach-Zehnder interferometer (MZI) with a large fringe visibility of up to 17 dB, which was fabricated by misaligned splicing a short section of thin core fiber between two sections of standard single-mode fiber. Such a MZI could be used to realize simultaneous measurement of tensile strain and temperature. Tensile strain was measured with an ultrahigh sensitivity of -0.023 dB/mu epsilon. via the intensity modulation of interference fringes, and temperature was measured with a high sensitivity of 51 pm/degrees C via the wavelength modulation of interference fringe. That is, the MZI-based sensor overcomes the cross-sensitivity problem between tensile strain and temperature by means of different demodulation methods. Moreover, this proposed sensor exhibits the advantages of low-cost, extremely simple structure, compact size (only about 10 mm), and good repeatability. (C) 2014 Optical Society of America
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