Multimode fibers (MMFs) have attracted interest because of their larger mode area and
additional spatial degrees of freedom compared with single-mode fibers. Recently, MMFs …

We provide a perspective overview of the emerging field of nonlinear optics in multimode
optical fibers. These fibers enable new methods for the ultrafast light-activated control of …

We review the research status of the mechanism and technology of all-fiber mode-locked
ultrafast laser with multimode fiber based saturable absorber. Using novel all-fiber structured …

A mode-locked all-fiber laser based on the nonlinear multimode interference (NL-MMI) effect
of the graded-index multimode fiber (GIMF) is proposed and demonstrated. The saturable …

We demonstrate a mode-locked all-fiber Tm laser using a single mode-step index multimode-
graded-index multimode-single mode fiber structure as a saturable absorber based on the …

A novel mode-locking method based on the nonlinear multimode interference in the
stretched graded-index multimode optical fiber (GIMF) is proposed in this Letter. The simple …

We report experimental observation of multimode Q-switching and spatiotemporal mode
locking in a multimode fiber laser. A typical steady Q-switching state is achieved with a 1.88 …

A detailed analysis of four-wave mixing (FWM) and its required phase-matching conditions
in graded-index multimode optical fibers is presented. The analysis is relevant mainly for …

An Er-doped mode-locked fiber laser with a saturable absorber based on single mode-
graded index multimode-single mode fiber (SMF-GIMF-SMF) with inner micro-cavity is …

We experimentally demonstrate for the first time, to the best of our knowledge, an all-fiber
passively mode-locked laser operation based on the nonlinear multimode interference of …