Pure-quartic soliton molecules in normal fourth-order dispersion regimes based on spectral filtering effect  

作　　者：Han-Yang Shen Rui-Bo Lan Hong-Bin Hu Yang Li Rui Zhou Zu-Xing Zhang 申翰阳;蓝睿博;胡洪彬;李阳;周瑞;张祖兴

机构地区：[1]Advanced Photonic Technology Laboratory,College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology),Nanjing University of Posts and Telecommunications,Nanjing 210023,China

出　　处：《Chinese Physics B》2025年第3期400-406,共7页中国物理B(英文版)

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.62175116)。

摘　　要：Recent theoretical verification of self-similar and dissipative pure-quartic solitons(PQSs)emphasized the similarity between PQS lasers and conventional fiber lasers,but the unique equilibrium mechanism hinders the formation of PQS molecules in normal fourth-order dispersion(FOD)regimes.In this paper,we investigated the effect of filters on shaping PQSs in normal FOD based on a passively mode-locked fiber laser model.A bandpass filter eliminates the time pedestal of dissipative PQSs,thus realizing a multi-pulsing state.When the filter bandwidth is appropriate,the effective spectral filtering effect can lower the pulse splitting threshold and enable the coherent restoration from chaotic PQSs to PQS molecules.Additionally,changing the central wavelength of the filter can generate PQSs and PQS molecules with asymmetric intensity distributions.These results are important guides for the manipulation of PQSs and the construction of high repetition-frequency fiber lasers.

关 键 词：pure-quartic soliton soliton molecule spectral filtering effect mode-locked fiber laser 

分 类 号：TN2[电子电信—物理电子学]