Abstract
The research of polarization-maintaining photonic crystal fiber with temperature insensitive characteristic is one of the important methods to solve the temperature dependence problem in the engineering application of an optical sensing system. This paper presents a new kind pentagonal polarization-maintaining photonic crystal fiber, and its polarization characteristic under the influence of temperature was analyzed based on the theory of the thermal expansion effect and thermal optic effect. The results show that the temperature dependence of the proposed fiber is significantly lower than that of the hexagonal photonic crystal fiber with the same design parameters at -50℃˜80℃. It has potential application value in some optic fiber sensing systems that need high precision and working stability under the turbulence of temperatures, such as fiber optical voltage sensor, fiber optical current sensor and fiber optic gyroscope.
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