ABSTRACT
We designed a dual-function nearly-zero Dispersion-Flattened/Polarization-Maintaining Photonic-Crystal Fiber (DF/PM PCF) for use with ultra broadband. The numeric results show that the DFIPM PCF delivers nearly-zero dispersion values between −1.00 and −0.12 ps/nm/km over a bandwidth range of 482 nm (1218–1700 nm). The operational band ranges from the O band (1260–1360 nm) to the U band (1625–1675 nm). In addition, the birefringence values of the proposed DF/PM PCF were estimated and shown to be between 0.93 × 10−3 and 1.25 × 10−3 in the operational band. Confinement losses for some wavelengths in the operational band were calculated and confirmed to be reasonable. The numeric results indicate that the DF/PM PCF has confinement losses of 2.75 × 10−3 to 3.39 × 10−1 dB/km in the operational band. Furthermore, the proposed DF/PM PCF was simulated and confirmed to work in single mode in the operational band. The device can be well used in a Dense Wavelength Division Multiplexing (DWDM) communication system.
