A Fiber-Optic System Generating Pulses of High Spectral Density


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Abstract

A cascade fiber-optic system that generates pulses of high spectral density by using the effect of nonlinear spectral compression is proposed. It is demonstrated that the shape of the pulse envelope substantially influences the degree of compression of its spectrum. In so doing, maximum compression is achieved for parabolic pulses. The cascade system includes an optical fiber exhibiting normal dispersion that decreases along the fiber length, thereby ensuring that the pulse envelope evolves toward a parabolic shape, along with diffraction gratings and a fiber spectral compressor. Based on computer simulation, we determined parameters of cascade elements leading to maximum spectral density of radiation originating from a subpicosecond laser pulse of medium energy.

About the authors

A. S. Abramov

Ulyanovsk State University

Email: korobkotam@rambler.ru
Russian Federation, Ulyanovsk, 432017

I. O. Zolotovskii

Ulyanovsk State University

Email: korobkotam@rambler.ru
Russian Federation, Ulyanovsk, 432017

D. A. Korobko

Ulyanovsk State University

Author for correspondence.
Email: korobkotam@rambler.ru
Russian Federation, Ulyanovsk, 432017

A. A. Fotiadi

Ulyanovsk State University; Université de Mons

Email: korobkotam@rambler.ru
Russian Federation, Ulyanovsk, 432017; Mons, B7000

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