饱和吸收体恢复时间对正交偏振耗散孤子的影响

Influence of SA recovery time on orthogonally polarized dissipative solitons

偏振在脉冲锁模时,对其塑形和稳定起着至关重要的作用。本研究开发了一种用于产生正交偏振耗散孤子的被动锁模石墨烯光纤激光器的正交偏振数值模拟。重点是分析由偏振依赖的石墨烯微光纤饱和吸收体引起的净正常色散双折射腔对正交偏振孤子的影响。研究结果表明,这种饱和吸收体的恢复时间显著影响正交偏振耗散脉冲的特性,如能量、脉宽、时间带宽乘积和啁啾。结果显示,其恢复时间为120飞秒时最佳,产生两个具有大啁啾的正交偏振的窄耗散孤子脉冲,分别约为7.47 ps和8.06 ps。这对于开发紧凑、高功率、偏振耗散孤子光纤激光系统具有重要意义。

Polarization is a crucial factor in shaping and stabilizing mode-locking pulses.We develop an orthogonally polarized numerical modeling of passive mode-locked graphene fiber lasers for generating orthogonally polarized dissipative solitons(DSs).The focus is on analyzing the influence of orthogonal polarization in this net-normal dispersion birefringent cavity caused by the polarization-dependent graphene microfiber saturable absorber.The research results demonstrate that the recovery time of such saturable absorbers significantly affects the characteristics of the orthogonally polarized DSs’output pulses,including energy,pulse width,time-bandwidth product,and chirps.Results show that its recovery time of 120 fs is optimal,producing two orthogonally polarized narrow dissipative soliton pulses with large chirps of about 7.47 ps and 8.06 ps.This has significant implications for the development of compact,high-power,polarized dissipative soliton fiber laser systems.