A size reduced cladding layer of highly Birefringent photonic crystal fiber (PCF) that is suitable for fiber optic gyroscope application is proposed in this paper. A pair of minimized and enlarged air holes in the innermost layer of PCF is responsible for high birefringence and enlarged outer layer air holes are responsible for low confinement loss. The optimized geometrical parameters for this novel PCF are chosen so as to ensure high birefringence and low confinement loss. Fabrication of this proposed PCF is simplified by reducing the cladding layers. Obtained birefringence of this PCF is about 6.1 10⁻⁴ and the confinement loss is about 2.8 10⁻⁴ dB km⁻¹.

本文提出了一种尺寸减小的高双折射光子晶体光纤 (PCF) 包覆层，适用于光纤陀螺仪应用。PCF 最内层中的一对最小化和扩大的气孔是高双折射的原因，而扩大的外层气孔是低限制损失的原因。选择这种新型 PCF 的优化几何参数以确保高双折射和低限制损失。通过减少包层简化了这种建议的 PCF 的制造。该PCF 获得的双折射约为6.1 10 ^-4并且限制损耗约为2.8 10 ^-4 dB km ^-1。