Dispersion Flattened/Polarization Maintaining Photonic Crystal Fiber

This article tailored the dispersion and increased the birefringence in a photonic crystal fiber (PCF), and then designed a dual function of dispersion flattened / polarization maintaining PCF (DF-PM-PCF). The numeric results indicate that the DF-PM-PCF achieves the dispersions within a window of 0 +/- 1.0 ps/nm/km over a bandwidth range of 679 nm (1235 nm similar to 1914 nm). In the meanwhile, the birefringence values of the DF-PM-PCF were estimated and shown that they are larger than 0.30 x 10(-3) in the operating band. Furthermore, the confinement losses of the device are calculated and confirmed that they are reasonable. The numeric results indicate that the DF-PM-PCF has confinement losses of 5.5x10(-4) dB/km to 1.4x10(-2) dB/km in the operating band.