关键词: 被动锁模, 耗散孤子, 群速度色散, 增益饱和能量

Abstract:

Dissipative soliton is one of the research hotspot in the field of nonlinear optical fiber optics because of its high single pulse energy. The characteristics of dissipative soliton in passively mode-locked Yb-doped fiber laser was studied. First, each device in the cavity is modeled. Then, the evolution of parabolic shape dissipative soliton with strictly linear chirp in the cavity is studied by numerical simulations. Finally, the influences of dispersion and gain saturation energy of Yb-doped fiber on pulse duration and peak power of dissipative soliton is analyzed. Simulations indicate that the pulse duration of the dissipative soliton becomes wider with increase of the dispersion, and the peak power decreases with increase of the dispersion. The effect of gain saturation energy on the pulse duration is non monotonic. When gain saturation energy is 70 pJ, the pulse duration reaches the minimum value. And the peak power of dissipative soliton increases linearly with the increase of gain saturation energy.

Key words: passively mode-locked, dissipative soliton, group velocity dispersion, gain saturation energy