Design of broadband dispersion compensating fiber with the small core photonic crystal fiber

This paper has presented a design of dispersion compensating fiber with small core photonic crystal fiber (PCF) based on pure silica. The designed small core PCF can be controlled the dispersion properties in terms of the structural parameters, the pitch Λ and the air-filling fraction d/Λ. The negative chromatic dispersion coefficient can be achieved - 586.5ps/(nm·km) at λ=1550nm with Λ=0.9μm and d/Λ=0.9. This kind of PCF can be used for broadband dispersion compensation in S+C+L band (1460-1565nm) and the chromatic dispersion coefficient is lower than -450ps/(nm·km) in S+C+L band. It can realize the dispersion slope compensation because that it exhibits a negative dispersion slope.

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