Amplification of frequency-modulated pulses in graded dispersion erbium-doped optical fibers

I. O. Zolotovskii^abc, D. A. Korobko^abc, O. G. Okhotnikov^abc, D. I. Sementsov^abc, A. A. Sysolyatin^abc, A. A. Fotiadi<sup>abc

a</sup> Technological Research Institute of Ulyanovsk State University
^b Optoelectronics Research Center, Tampere University of Technology, 31101 Tampere
^c Fiber Optics Research Center of the Russian Academy of Sciences, Moscow

Abstract: The possibility of effective amplification of self-similar frequency-modulated pulses in longitudinally nonuniform erbium-doped optical fibers has been studied. A general expression is obtained for the coordinate dependence of the normal dispersion of group velocities that ensures "fast" amplification of the frequency-modulated pulses. It is shown that, at an optimum choice of the dispersion profile, subpicosecond pulses can be amplified up to energies above 1 nJ and peak powers above 50 kW.

Received: 15.06.2012

 English version: Technical Physics Letters, 2012, 38:11, 1020–1023

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