Realization of wavelength conversion with hyperbolic secant femtosecond pulse in normal dispersion regime

• Published in: Journal of modern optics 2010-05, Vol.57 (8), p.601-606
• Main Authors: Esmaeilian-Marnani, A., Abas, A.F., Moravvej-Farshi, M.K., Ebnali-Heidari, M.
• Format: Article
• Language: English
• Subjects: anomalous and normal dispersion regime; Conversion; dark soliton; Dispersions; Exact sciences and technology; Femtosecond; Femtosecond pulses; Fiber optics; Frequency conversion; harmonic generation, including high-order harmonic generation; Fundamental areas of phenomenology (including applications); higher-order soliton decay; Nonlinear equations; Nonlinear optics; Nonlinearity; Optical solitons; nonlinear guided waves; Optics; Perturbation; Physics; Solitons; Waveform analysis; wavelength conversion; Wavelengths
• ISSN: 0950-0340; 1362-3044
• DOI: 10.1080/09500340.2010.483293

Realization of wavelength conversion based on second-order femtosecond dark solitons with hyperbolic secant pulse is presented. This is achieved by introducing localized dispersion perturbation along the optical fiber. We demonstrate that an initial 30 fs second-order pulse decays to similar sub-pulses by applying perturbation using a step increment of β 2 from 6.3 to 15.75 ps 2 km −1 . This shows that the realization of a 1 × 2 channel wavelength converter for femtosecond pulses is possible. Recent research shows the possibility of realizing wavelength conversion generated from picosecond solitons neglecting nonlinear effects. However, employing the same method for femtosecond pulses fails due to the manifestation of nonlinear effects. In this paper, pulse deformation under different levels of perturbation was tested, and appropriate perturbation leading to similar sub-pulses is achieved.