We propose a novel highly birefringent photonic crystal fiber (PCF) based on a double-hole unit. Because of the effect of the double-hole unit in which double airholes can be effectively viewed as elliptical airholes, the proposed PCF can achieve birefringence similar to that of an elliptical-hole PCF with high birefringence even up to the order of 0.01 and still avoid the inherent challenge to fabricate an elliptical-hole PCF. The proposed PCF also has a lower confinement loss than an elliptical-hole PCF with the same air-filling fraction.
© 2010 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: January 4, 2010
Revised Manuscript: February 20, 2010
Manuscript Accepted: February 23, 2010
Published: March 17, 2010
Daru Chen and Genzhu Wu, "Highly birefringent photonic crystal fiber based on a double-hole unit," Appl. Opt. 49, 1682-1686 (2010)