A highly birefringent photonic crystal fiber with compact cladding layers suitable for fiber optic gyroscope application

Abstract

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.

A Highly Birefringent Photonic Crystal Fiber with Three Rows of Circular Air Holes

“…Instead of adjusting the length and width of the fiber core by increasing or decreasing the number of air holes, the structure designed by the arrangement and combination of air holes, which restricts the energy in the center and forms an elliptical mode field, belongs to the elliptical fiber core [9,[11][12][13][14][15][16][17][18][19][20]. Elliptical fiber cores are generally composed of all-circular air hole arrangements [15], all-elliptical air hole arrangements [17], or a combination of circular and elliptical air holes [18] to limit energy in the fiber core.…”