Abstract
A detailed investigation of the nonlinear multimodal interference in a short graded-index multimode optical fiber is presented. The analysis is performed for a specific device geometry, where the light is coupled in and out of the multimode fiber via single-mode fibers. The same device geometry was recently used to obtain ultra-low-loss coupling between two single-mode optical fibers with very different mode-field diameters. Our results indicate the potential application of this simple geometry for nonlinear devices, such as in nonlinear switching, optical signal processing, or as saturable absorbers in mode-locked fiber lasers. Saturable absorption in this all-fiber configuration is discussed and it is shown that it provides attractive properties that can potentially be used in high pulse energy mode-locked fiber lasers.
© 2013 Optical Society of America
Full Article | PDF ArticleMore Like This
Guohao Fu, Jiading Tian, Tiancheng Qi, Yulun Wu, Ying Zhao, Qirong Xiao, Dan Li, Mali Gong, and Ping Yan
Opt. Express 30(21) 39086-39100 (2022)
Wei Pan, Liang Jin, Jiazhu Wang, Renyan Wang, He Zhang, Xu Yingtian, Xin Zhao, Yang Li, and Xiaohui Ma
Appl. Opt. 60(4) 923-928 (2021)
Huanhuan Li, Zhaokun Wang, Can Li, Junjie Zhang, and Shiqing Xu
Opt. Express 25(22) 26546-26553 (2017)