Abstract
This paper proposes a novel way for controlling the generation of the dissipative bright soliton and dark soliton operation of lasers. We observe the generation of dissipative bright and dark soliton in an all-normal dispersion fiber laser by employing the nonlinear polarization rotation (NPR) technique. Through adjusting the angle of the polarizer and analyzer, the mode-locked and non-mode-locked regions can be obtained in different polarization directions. Numerical simulation shows that, in an appropriate pump power range, the dissipative bright soliton and dark soliton can be generated simultaneously in the mode-locked and non-mode-locked regions, respectively. If the pump power exceeds the top limit of this range, only dissipative soliton will exist, whereas if it is below the lower bound of this range, only dark soliton will exist.
Highlights
With the rapid development of ultrafast optical field, a great many researchers have been focusing on mode-locked fiber laser recently [1,2,3,4,5,6,7]
We propose a novel way for controlling the generation of the dissipative bright soliton and dark soliton operation of lasers
Since the saturation energy Esat is proportional to the pumping strength [35], this means increasing Esat corresponds to increasing the pump power in the practical system
Summary
With the rapid development of ultrafast optical field, a great many researchers have been focusing on mode-locked fiber laser recently [1,2,3,4,5,6,7]. Passive mode-locked fiber lasers have shown many advantages over solid-state systems such as the compact design, low-cost, and stability [8,9,10,11]. It has some potential applications, like laser processing, optical communications, medical equipment, military, and so on [12,13,14]. Dissipative soliton (DS) has attracted great interest in the development of fiber lasers because it can significantly improve the deliverable energy of pulse, approaching or even exceeding 100 nJ [18, 19], and the DS exists in nonconservative systems whose dynamics are extremely different from those of conventional soliton [20,21,22]. The resulting differential equations are called coupled cubic Ginzburg-Landau equations (CGLE) [34], shown as g ∂2 ux β ∂2 ux g
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