Numerical Investigations on Birefringent Holey Fibers by Modified Elliptical Air Holes in Fiber Cladding

作者：Chau Yuan Fong^*; Lin Gui Min; Liao Chiung Chou; Wang Shinn Fwu; Wei Jeng Hua

来源：Japanese Journal of Applied Physics, 2011, 50(11): 112502.

DOI：10.1143/JJAP.50.112502

In this study, we numerically propose a high-birefringence and low-loss index-guiding photonic crystal fiber (PCF) and compare it with three other types of PCF. Four cases of PCFs are investigated by the finite element method. A high modal birefringence is obtained when the cladding is composed of elliptical air holes placed asymmetrically, with two half-size elliptical air holes on the top and bottom of the PCF core. The size control of these air holes is the key to reaching a high birefringence and a low confinement loss. Numerical results confirm that the proposed structure at an excitation wavelength lambda = 1550nm shows a birefringence of up to 2: 085 x 10(-2) and a confinement loss of less than 1.63 x 10(-5) dB/km.

• 出版日期2011-11