Impact of initial pulse shape on the nonlinear spectral compression in optical fibre. (1st February 2018)

• Record Type: Journal Article
• Authors: Boscolo, Sonia; Chaussard, Frederic; Andresen, Esben; Rigneault, Hervé; Finot, Christophe
• Is Part Of: Optics & laser technology. Volume 99(2018)
• Page Start: 301
• Page End: 309
• Publication Date: 2018-02-01
• Subjects: Nonlinear spectral compression -- Nonlinear fiber optics -- Pulse shaping; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2017.08.033
• Languages: English
• ISSNs: 0030-3992

Abstract

Highlights: The initial temporal intensity profile affects the nonlinear spectral compression. No significant spectral narrowing occurs when super-Gaussian pulses are used. Triangular pulses lead to a Fresnel bi-prism like spectral interference phenomenon. Abstract: We theoretically study the effects of the temporal intensity profile of the initial pulse on the nonlinear propagation spectral compression process arising from nonlinear propagation in an optical fibre. Various linearly chirped input pulse profiles are considered, and their dynamics is explained with the aid of time-frequency representations. While initially parabolic-shaped pulses show enhanced spectral compression compared to Gaussian pulses, no significant spectral narrowing occurs when initially super-Gaussian pulses are used. Triangular pulses lead to a spectral interference phenomenon similar to the Fresnel bi-prism experiment.