Tailoring polarization maintaining broadband residual dispersion compensating octagonal photonic crystal fibers

Abstract

We present a residual dispersion compensating highly birefrin- gent photonic crystal fiber (PCF) based on an octagonal structure for broadband dispersion compensation in the wavelength range 1460- 1625 nm. The finite element method with perfectly matched boundary con- dition is used as the numerical design tool. It has been shown theoretically that it is possible to obtain a negative dispersion coefficient of about −418 to −775 ps∕nm∕km over the S-, C-, and L-bands, relative dispersion slope (RDS) close to that of single mode fiber (SMF) of about 0.0036 nm −1 at 1550 nm. According to the simulation, birefringence of 2 × 10 −2 is obtained at 1550-nm wavelength. The variation of structural parameters is also studied to evaluate the tolerance of the fabrication. The proposed octago- nal PCF can be a potential candidate for residual dispersion compensation as well as maintaining single polarization in optical fiber transmission sys- tem. © 2013 Society of Photo-Optical Instrumentation Engineers (SPIE) (DOI: 10.1117/1.OE .52.11.116111)