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The interaction of dual wavelength solitons in fiber laser

The dual wavelength solitons with 41.2 nm spectral separation are achieved simultaneously via nonlinear polarization rotation technique. One is the picosecond soliton, the other is femtosecond soliton. The direct interaction of two solitons does not happen firstly for the temporal separation between them is beyond 5 times of their duration. When the continuous wave (CW), as the roles to cause the direct soliton interaction through shifting the central wavelength of the solitons, are excited to appear, the interaction of dual wavelength solitons happens. There are some dips present on the femtosecond soliton spectra, indicating the interaction between dual wavelength solitons. The power of CW affects the intensities of dips in the spectra and the pulse numbers and relative position of pulse bunches. The more the power of CW, the more the intensities of the dips at the femtosecond soliton spectra are.