Subharmonic Entrainment Breather Solitons in Ultrafast Lasers
Subharmonic Entrainment Breather Solitons in Ultrafast Lasers
复制标题
超快激光器中的次谐波夹带呼吸孤子
DOI：
10.1103/physrevlett.125.163901
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发表时间：
2020
影响因子：
8.6
通讯作者：
Zhang Wenyan
中科院分区：
文献类型：
--
作者：
Xian Tianhao;Zhan Li;Wang Wenchao;Zhang Wenyan
We study theoretically and experimentally the subharmonic entrainment (SHE) breather soliton in mode-locked lasers for the first time, in which the ratio of the breather period to the round-trip time is an integer. We build a non-Hermitian degeneracy map of breather soliton, and illustrate that SHE arises between the two exceptional points (EPs). We obtain SHE at the ratio of 20, observe the evolution of breather soliton when tuning the gain and/or cavity loss, and prove that this phenomenon can improve the stability of breather soliton. Our research brings insight into the EP physics of ultrafast lasers and makes the mode-locked laser a powerful test bed for non-Hermitian degeneracy, which may open a new course in ultrafast laser research.
