ANSYS-based birefringence property analysis of side-hole fiber induced by pressure and temperature
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In this paper, we theoretically investigate the influences of pressure and temperature on the birefringence property of side-hole fibers with different shapes of holes using the finite element analysis method. A physical mechanism of the birefringence of the side-hole fiber is discussed with the presence of different external pressures and temperatures. The strain field distribution and birefringence values of circular-core, rectangular-core, and triangular-core side-hole fibers are presented. Our analysis shows the triangular-core side-hole fiber has low temperature sensitivity which weakens the cross sensitivity of temperature and strain. Additionally, an optimized structure design of the side-hole fiber is presented which can be used for the sensing application.
KeywordsFiber optics birefringence pressure measurement temperature
This research is supported by the Fundamental Research Funds for the Central Universities [DUT 15RC(3) 112].
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