Analysis of Effect of Chromatic Dispersion for Wavelength Tunable Ultrashort Soliton Pulse Generation

The performance characteristics of generated soliton and anti-Stokes pulses for the wavelength tunable ultrashort soliton pulse generation system are discussed for different fiber dispersion parameters of β₂ and β₃ at the pump wavelength. Numerical analysis showed that the broadband wavelength tunability is improved as both the absolute value of negative β₂ and the value of β₃ are decreased. When β₃ is the usual value, the best performance of broadband continuous wavelength tunability which broadens symmetrically to the pump wavelength is obtained for β₃ of around 蜢2 psβ²/km. The reason for this is that the behaviors of both the generated soliton and anti-Stokes pulses are due to the β₂. Through simulations for different fiber dispersion parameters of β₂ or β₃ we obtained interesting results. When β₃ is negative and the zero dispersion wavelength is set at the longer wavelength side than the pump wavelength, such as around 2 μm, it is possible to convert the generated soliton into new components at the longer wavelength side over 2 μm.