Role of the Input Profile Asymmetry and the Chirp on the Propagation in Highly Dispersive and Nonlinear Fibers

Truncated Airy pulses supercontinuum generation in a silicon-on-insulator optical waveguide including third-harmonic generation and negative-frequency Kerr terms

“…The truncation coefficient or decay factor 𝑎 (0 < 𝑎 < 1) is a quantity to ensure containment of the infinite Airy tail and can thus enable the physical realization of such pulses [36]. In practice, an Airy pulse can be produced by adding a cubic phase to a Gaussian spectrum [7,35,36]. The truncation coefficient is taken as 𝑎 = 0.05.…”

“…In the SCG studies, the overwhelming majority of prior studies already cited above [1][2][3][4][5][6]8,9] utilized intense optical pulses with symmetric and compact temporal profiles such as Gaussian or sech-type pulses while the only ones that focused on Airy pulses are those of refs. [7,10,11,13]. One should remind that, Airy pulses are first predicted by Berry and Balazs within the context of quantum mechanics [14] and, their first introduction in nonlinear optics followed in 2007 by Siviloglou and Christodoulides [15].…”

“…The drastic spectral broadening known as the supercontinuum generation (SCG) and obtained in highly nonlinear media from intense pulses through the combination of both linear and nonlinear processes, has been nowadays extensively investigated [1][2][3][4][5][6][7][8][9][10][11]. The particular attention on the SCG phenomenon has led to numerous applications in nonlinear optics such as biophotonics applications [1,3] (spectroscopy, microscopy, optical coherence tomography, diffuse optical spectroscopy and tomography...), optical frequency metrology [2], optical telecommunications applications [3] (multichannel telecommunication sources in wavelength-division multiplexing systems, pulse compressors...).…”

“…It consists in improving the input pulse characteristics for this achievement. This technique encompasses managing the profile, the timewidth, the power or other parameters as the initial chirp [7,12]. In the SCG studies, the overwhelming majority of prior studies already cited above [1][2][3][4][5][6]8,9] utilized intense optical pulses with symmetric and compact temporal profiles such as Gaussian or sech-type pulses while the only ones that focused on Airy pulses are those of refs.…”

“…(iii) What about its coherence properties ?. It should be noted that the characteristics of the Airy pulses have already been studied in the context of SOI waveguides [22][23][24]60,61] but not in the context of the SCG (except for other kinds of waveguides [7,10,11]) and even more in the consideration of the terms of multiphoton absorption with the terms NFK and THG.…”