多模光纤
光学
非线性薛定谔方程
超短脉冲
光纤激光器
饱和吸收
模式音量
单模光纤
干扰(通信)
材料科学
纤维
光纤
非线性系统
物理
激光器
塑料光纤
电信
计算机科学
量子力学
复合材料
频道(广播)
作者
Guohao Fu,Jiading Tian,Tiancheng Qi,Yulun Wu,Ying Zhao,Qirong Xiao,Dan Li,Mali Gong,Ping Yan
出处
期刊:Optics Express
[The Optical Society]
日期:2022-10-07
卷期号:30 (21): 39086-39086
被引量:2
摘要
This paper presents an approach that combines the generalized multimode nonlinear Schrodinger equation with a transmission model to analyze spatiotemporal characteristics of multimode interference in single mode/large mode area fiber-graded-index multimode fiber-single mode fiber (SMF/LMA-GIMF-SMF) structures for the first time. Approximated self-imaging (ASIM) behavior in GIMF and the study of the latter structure used in spatiotemporal mode-locked fiber lasers are first demonstrated. Simulations show that these structures can work as saturable absorbers enabling high-energy pulse output due to nonlinear intermodal interactions and intensity-dependent multimode interference. Otherwise, underlying ASIM is proven that it can perturb the transmission of SMF/LMA-GIMF-SMF, causing instability of their saturable-absorption characteristics. This paper provides a theoretical guide for many applications, such as beam shaping, mode conversion, and high-energy ultrafast fiber laser.
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