Optimization of microstructured fiber for dispersion compensation purposes

A new dispersion compensating microstructured optical fiber is presented. The dispersion slope of the designed fiber is opposite to the dispersion of standard PCF for potential broadband dispersion compensation. Since chromatic dispersion is optimized for wide bandwidth, the considered structure is suitable for repeaters in transmission systems with wavelength division multiplex. Another contribution of this work is a new flat-dispersion PCF operating at telecom wavelengths. Required dispersion, achieved by balancing material and waveguide dispersion are done for wide spectrum of wavelengths. For example, dispersion of -0.025 ps/nm/km from a wavelength of 1200 nm to 1700 nm is achieved using a highly nonlinear photonic crystal fiber. The results are obtained by using the full-vectorial finite difference frequency domain method.