CONTROLLED EXCITATION OF SCAR MODES IN PASSIVE AND ACTIVE MULTIMODE CHAOTIC FIBERS

Description

A multimode optical fiber with a D-shaped cross section is an experimental paradigm of a wave system with chaotic rays' dynamics. We show that seldom but usable modes, called scar modes, localized along some particular direction of the geometrical trajectories can be selectively excited. We report numerical simulations that demonstrate the importance of the so-called self focal point in the scar modes selection process. We use a localized illumination in a passive fiber, or, a localized gain in an Ytterbium-doped fiber, located in the vicinity of this special point to control the scar modes selection.

Abstract

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