摘要
色散傅里叶变换技术为研究被动锁模光纤激光器中孤子各种瞬时、复杂、非重复的非线性过程提供了一种强有力的实时测量手段。利用色散傅里叶变换技术研究了基于非线性偏振旋转技术的被动锁模光纤激光器中耗散孤子分裂的整个实时动态过程。研究发现,当泵浦功率为280 mW时耗散孤子发生分裂,耗散孤子分裂前首先由噪声背景脉冲产生单孤子脉冲。与泵浦功率为180 mW时的单孤子锁模状态不同的是,分裂前的单孤子的光谱上有新的光谱成分产生。这个新的频率成分会随着孤子脉冲在谐振腔中循环的圈数不断放大和展宽,并最终演化为一个新的耗散孤子脉冲。本研究对明确被动锁模光纤激光器中耗散孤子的产生和分裂机理有着重要的意义。
Dispersive Fourier transform offers a powerful real-time way to measure the transient,complex,and non-repetitive nonlinear dynamics of the soliton in a passively mode-locked fiber laser.With this technique,we investigate the real-time fission dynamics of a dissipative soliton in a passively mode-locked fiber laser based on the nonlinear polarization rotation technique.The results show that the dissipative soliton fissions occur when the pump power is 280 mW and that a single soliton pulse is generated by the background noise pulse before the dissipative soliton fissions.Different from the single soliton mode-locking state when the pump power is 180 mW,a new spectral component is observed on the spectrum of the single soliton generated before fission.The new frequency component amplifies and stretches with the increase in the number of round trips and ultimately evolves into a new dissipative soliton pulse.This research is significant for understanding the formation and fission mechanism of the dissipative soliton in a passively mode-locked fiber laser.
作者
韩冬冬
张佳月
任凯利
郑益朋
惠战强
赵峰
巩稼民
Han Dongdong;Zhang Jiayue;Ren Kaili;Zheng Yipeng;Hui Zhanqiang;Zhao Feng;Gong Jiamin(School of Electronic Engineering,Xi′an University of Posts&Telecommunications,Xi′an,Shaanxi 710121,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2022年第7期15-20,共6页
Acta Optica Sinica
基金
国家自然科学基金(61805198)
陕西省重点研发计划(2020KWZ-017)
西安市科技计划项目(2019218114GXRC017CG018-GXYD17.21)。
关键词
光纤光学
耗散孤子
孤子分裂
锁模
光纤激光器
fiber optics
dissipative soliton
soliton fission
mode locking
fiber laser
