Nonlinear optical switch for laser Q-switching based on cascaded long-period fiber gratings in Yb-doped fiber and fiber Bragg grating

摘要

We propose an all-fiber Q-switched fiber laser in which the optical switch exploits interplay between resonant nonlinearity of a section of ytterbium-doped fiber and transmission of fiber gratings combination. Switching characteristics of the nonlinear switch are analyzed using numerical model.