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Real-time dynamics of soliton collision in a bound-state soliton fiber laser
摘要： We experimentally investigated the soliton collisions between soliton molecules and deuterogenic solitons spontaneously generated on the continuous wave (cw) noise background in an ultrafast erbium-doped fiber laser mode locked with MoS2 saturable absorber (SA). The dynamics of the soliton collisions were observed using the time-stretch dispersion Fourier transform technique. The noise-induced deuterogenic solitons first undergo spectral broadening and wavelength shifting, then collide successively with a soliton molecule and eventually vanish. Within the simple collision framework, the spectral-temporal dynamics of soliton collision would help to unveil the self-stabilization mechanism of the soliton molecules in consideration of dispersive wave shedding. This nonlinear dynamics is similar to the soliton rain, except that complex condensed soliton phase is substituted with a soliton molecule.
关键词： time-stretch dispersive Fourier transform.,soliton molecule,molybdenum disulfide,soliton collision
更新于2025-09-12 10:27:22
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SnS2 Nanosheets for Er-Doped Fiber Lasers
摘要： Stannic sulfide (SnS2), a latterly developed two-dimensional (2D) material, has fascinated scientists because it can be widely applied to materials chemistry, biomedicine, photocatalysis, etc. Especially, SnS2 have advantages of adjustable band-gap and good oxidation resistance, which indicates that this material has promising potential in nonlinear optics. However, the light interaction with-SnS2 is rarely investigated. In this study, high-quality SnS2 nanosheets (Ns) developed through a liquid phase exfoliation approach have been applied in ultrafast photonics for nonlinear processes. This fabrication approach can greatly increase the damage threshold of the SnS2 saturable absorber (SA). Furthermore, the SnS2 SA device is applied to an erbium-doped fiber laser (EDFL) resonator to obtain soliton molecules with different order. Ultimately, 11th-order soliton molecules, the highest order of soliton molecules through SnS2, are generated with soliton separation of 8 ps and spectral modulation period of around 1 nm. The above experimental results indicate that SnS2 has broad application prospects in the fields of mode-locked fiber laser and optical fiber communication, etc.
关键词： soliton molecule,mode-locking,2D material,SnS2,Er-doped fiber laser
更新于2025-09-12 10:27:22