Optimal design of wavelength converters based on four-wave mixing in photonic crystal fibers with two zero-dispersion wavelengths

摘要

In this paper, we show that the bandwidth of wavelength converters based on four-wave mixing can be considerably broadened if photonic crystal fibers with two zero-dispersion wavelengths are used as the Kerr media. The design method of fiber parametric wavelength converters based on photonic crystal fibers with two zero-dispersion wavelengths is proposed. It is proved that when the input signal wavelength is close to the center of the two zero-dispersion wavelengths, the maximal tuning range of the converted wave can be obtained. And the tuning range is approximately two times the difference of the two zero-dispersion wavelengths, which in turn can selected by tailoring the geometrical parameters of photonic crystal fibers. Numerical simulations show that after such converters can achieve ultra broadband tuning range and high conversion efficiency with much lower pump power and shorter fiber.