Abstract

Starting from the paraxial wave equation, an analytic expression for filament threshold in fiber lasers is derived. The occurrence of filamentation is determined by the larger of two thresholds, one of perturbative gain and one of spatial confinement. The threshold value is approximately a few megawatts, depending on the parameters of the fiber.

© 2007 Optical Society of America

Design of large-mode-area amplifier fibers resistant to bend-induced distortion

John M. Fini
J. Opt. Soc. Am. B 24(8) 1669-1676 (2007)

Al/Ge co-doped large mode area fiber with high SBS threshold

Ming-Jun Li, Xin Chen, Ji Wang, Stuart Gray, Anping Liu, Jeffrey A. Demeritt, A. Boh Ruffin, Alana M. Crowley, Donnell T. Walton, and Luis A. Zenteno
Opt. Express 15(13) 8290-8299 (2007)

Impact of transverse spatial-hole burning on beam quality in large-mode-area Yb-doped fibers

Z. Jiang and J. R. Marciante
J. Opt. Soc. Am. B 25(2) 247-254 (2008)

Analysis of mode characteristics of fiber Bragg gratings in large-mode-area double-clad fibers

Di Wang, Qinggui Tan, Xiaojun Li, Jinman Ge, Wei Jiang, Dong Liang, and Haiwen Cai
J. Opt. Soc. Am. B 36(3) 768-774 (2019)

Leakage channel optical fibers with large effective area

Liang Dong, Xiang Peng, and Jun Li
J. Opt. Soc. Am. B 24(8) 1689-1697 (2007)