Open AccessTheoretical study of mode evolution in active long tapered multimode fiber
Author(s) -
Chen Shi,
Xiaolin Wang,
Pu Zhang,
Xiaojun Xu,
Qin Lu
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.019473
Subject(s) - optics , multi mode optical fiber , curvature , mode volume , single mode optical fiber , mode coupling , amplifier , mode (computer interface) , optical fiber , physics , materials science , optoelectronics , plastic optical fiber , computer science , geometry , mathematics , cmos , operating system
A concise and effective model based on coupled mode theory to describe mode evolution in long tapered active fiber is presented in this manuscript. The mode coupling due to variation of core radius and slight perturbation have been analyzed and local gain with transverse spatial hole burning (TSHB) effect, loss and curvature have been taken into consideration in our model. On the base of this model, the mode evolution behaviors under different factors have been numerically investigated. Our model and results can provide instructive suggestions when designing long tapered fiber based laser and amplifiers.