Photonic crystal fiber with anomalous dispersion behavior and high birefringence

A novel design of hexagonal PCF has been investigated with variation in areas of circular air holes. The structure consists of six rings. The three outermost ring has largest circular air holes. The immediate two rings next to the innermost ring consists of smallest circular air holes. The innermost ring consists of circular air holes whose area is lesser than the three outermost rings but larger than the second and third ring. The designed fiber reports a very low dispersion. Moreover a high birefringence is observed at the first optical window. Besides, normalized frequencies and confinement loss is also studied. This fiber can be used for generation of broadband supercontinnum and soliton based devices.