.An asymmetric dual-core single-polarization single-mode photonic crystal fiber coupler[J].Optoelectronics Letters,2010,6(4):272-274 An asymmetric dual-core single-polarization single-mode photonic crystal fiber coupler 李宏雷 Key Lab of All Optical Network and Advanced Telecommunication Network of Education Ministry of China,Institute of Lightwave Technology,Beijing Jiaotong University； Abstract:       A vectorial finite element method (VFEM) is adopted to investigate the novel single-polarization single-mode (SPSM) photonic crystal fiber (PCF) coupler which has asymmetric dual-core and two lines of enlarged air holes. It is demonstrated that the SPSM region of the designed fiber can be more than 250 nm wide with a set of optimized air-hole parameters and the width of the SPSM region could change slightly by fine adjustment of the inner large air holes. The coupling length between the odd and even x-polarization modes is also investigated through fine-tuning the large and small air-hole diameters. Hits: 3940 Download times: 196 View Full Text    Download reader