Dear Colleagues,

As its name conceptualizes, a multimode fiber is an optical fiber which supports the simultaneous propagation of a multitude of guided modes. This is achieved by a large core area whose diameter may range from a few tens to several hundreds of microns. The degree of freedom enabled by the multimodality provides several advantages both for the investigation of fundamental effects, e.g., those that exploit the complex coupling among the multitude of modes, and for applications, e.g., in the field of space-division-multiplexed telecommunications.

Interest in multimode fibers has recently experienced exponential growth, mostly owing to their breakthrough potential for technologies based on nonlinear optical effects. For instance, in the field of high-power photonic devices, multimode fibers allow for the demonstration of high-power fiber lasers and their application in material micromachining. Moreover, nonlinear optics in multimode fibers permit, on the one hand, the enhancement of the resolution of biomedical imaging devices and, on the other hand, the generatation of supercontinuum light, which is a frontier topic in the field of optical sources.

As a matter of fact, at variance with their single mode counterpart, which only allows the propagation of one mode, in multimode fibers, the nonlinearity of the material merges with a complex multimodality, giving rise to a novel universe of phenomena, such as the generation of the so-called spatiotemporal solitons. For this reason, multimode fibers have been targeted as testbeds for the investigation of complex physical systems.

This Special Issue aims at attracting all researchers working in this research field and at collecting new findings and recent advances in the field of multimode nonlinear fiber optics, both fundamental-science- and application-oriented. In particular, we encourage the submission of manuscripts, either research or review works, related to the following areas:

• Nonlinear effects in multimode fibers;
• Nonlinear dynamics in multimode fibers;
• Ultrafast phenomena in multimode fibers;
• Multimode fiber lasers and amplifiers;
• Multimode nonlinear fiber design and fabrication;
• Multimode fiber supercontinuum sources;
• Specialty multimode nonlinear optical fibers;
• Mid-IR multimode fibers;
• Multimode fibers applications;
• Multimode solitons and light bullets.

Dr. Mario Ferraro
Dr. Fabio Mangini
Dr. Pedro Parra-Rivas
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Fibers is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

• multimode fibers
• nonlinear optical fibers
• nonlinear optics
• optical fibers
• optical solitons
• multimode solitons
• spatiotemporal solitons
• spatiotemporal complexity
• multimode complexity
• light bullets