This article is cited in 2 papers

Lasers

Effect of recovery time of nonlinear absorber saturated losses on the soliton pulse structure in a fibre laser with different cavity lengths

A. A. Mastin^a, P. A. Ryabochkina<sup>b

a</sup> Technopark-Mordovia, Saransk
^b Ogarev Mordovia State University, Saransk

Abstract: Using numerical simulation methods, we have calculated the dependences of the pulse profile and spectrum of a ring fibre laser in the region of anomalous group velocity dispersion on the length of the laser cavity and the recovery time of the nonlinear absorber saturated losses. It is found that with increasing cavity length the laser pulse acquires a pedestal, the positions of its edges corresponding to the frequencies of the Kelly sidebands. It is shown that the finiteness of the recovery time of the saturable absorber leads to an asymmetry in the profile and spectrum of the laser pulse.

Keywords: soliton fibre laser, Kelly sidebands, saturable losses, nonlinear saturable absorber, recovery time.

Received: 09.05.2019
Revised: 11.06.2019

 English version: Quantum Electronics, 2019, 49:9, 819–823

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