We investigate the coupling characteristics in dual-core photonic crystal fibers (PCFs) with elliptical air holes and their applications in the construction of polarization splitters by use of a full-vector beam propagation method. The numerical simulation results indicate the possibility of realizing a polarization splitter with an extinction ratio better than -20 dB at 1.55 microns and a total length of only 1.651 mm. It is also revealed that the total length of the polarization splitters can be further reduced by properly doping the core regions of the PCFs.
© 2005 Chinese Optics Letters
(060.2290) Fiber optics and optical communications : Fiber materials
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.4510) Fiber optics and optical communications : Optical communications
(220.0220) Optical design and fabrication : Optical design and fabrication
(230.0230) Optical devices : Optical devices
Weiqing Wu, Xiongwen Chen, Hui Zhou, Kaifeng Zhou, Xusheng Lin, and Sheng Lan, "Effective polarization splitters based on dual-core photonic crystal fibers with elliptical holes," Chin. Opt. Lett. 3, S280-S283 (2005)