Birefringence sensitivity to temperature of polarization maintaining photonic crystal fibers

In this paper, we investigate the birefringence of polarization maintaining photonic crystal fibers (PM-PCFs) under thermal effect. Modeling and simulation of PM-PCFs under thermal effect are conducted. Birefringence in a PM-PCF as a function of the temperature is measured experimentally. The experimental results are in agreement with theoretical calculation, and show that the relative temperature dependent birefringence coefficient of the PM-PCF, dΔn/dT/Δn, is 2.93×10−5/°C, which is typically ∼35 times less than that of conventional panda fibers. The insensitivity of polarization properties in PM-PCFs to temperature is demonstrated. These findings have important benefits in fiber optic systems and sensors, especially in fiber optic gyroscopes (FOG) where it translates into a lower polarization error and thus a higher measurement precision.

► We model the PM-PCF under thermal effect.
► We examine birefringence in PM-PCF as a function of the temperature.
► The sensitivity of birefringence in PM-PCFs is ∼35 times less than panda fibers.
► PM-PCFs can reduce the polarization error of gyroscopes.