High-sensitivity strain sensor based on in-fiber rectangular air bubble
Scientific Reports2015Vol. 5(1), pp. 7624–7624
Citations Over TimeTop 10% of 2015 papers
Shen Liu, Kai-Ming Yang, Yiping Wang, Junle Qu, Changrui Liao, Jun He, Zhengyong Li, Guolu Yin, Bing Sun, Jiangtao Zhou, Guanjun Wang, Jian Tang, Jing Zhao
Abstract
We demonstrated a unique rectangular air bubble by means of splicing two sections of standard single mode fibers together and tapering the splicing joint. Such an air bubble can be used to develop a promising high-sensitivity strain sensor based on Fabry-Perot interference. The sensitivity of the strain sensor with a cavity length of about 61 μm and a wall thickness of about 1 μm was measured to be up to 43.0 pm/με and is the highest strain sensitivity among the in-fiber FPI-based strain sensors with air cavities reported so far. Moreover, our strain sensor has a very low temperature sensitivity of about 2.0 pm/°C. Thus, the temperature-induced strain measurement error is less than 0.046 με/°C.
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