Wavelength Conversion in Photonic Crystal Fibers via Multiple Raman Redshifts and Soliton Spectral Tunneling

The soliton spectral tunneling effect in photonic crystal fibers with three zero-dispersion wavelengths is an effective way to realize pulse wavelength conversion. However, due to the limitation of the soliton splitting mechanism, forming a tunneling soliton with larger energy and wider width by increasing the number of Raman redshifts is still a key challenge. Airyprime pulses generate polychromatic Raman solitons with small truncation coefficients, and they converge into a stable soliton after the soliton tunneling effect, which provides a new possibility to solve this problem. This paper discusses how to control the energy, width and central wavelength characteristics of the tunneling solitons generated in the photonic crystal fiber with three zero-dispersion wavelengths by adjusting the truncation coefficient α, peak power P and central wavelength λ of the initial Airyprime pulse. The results show that the smaller the truncation coefficient α, the greater the number of Raman self-frequency shifts and the greater the energy of the formed tunneling soliton. The increase in initial power P0 will lead to an increase in tunneling soliton width. The larger initial center wavelength λ will significantly increase the width and center wavelength position of the tunneling soliton. These findings provide a theoretical basis for the application of Airyprime pulses in ultrafast optical wavelength control and new light source development.