Gain-controlled wave chaos in a chaotic optical fibre

Abstract

In this paper, we present a non-standard fibre amplifier specially designed to amplify scar modes of a multimode chaotic optical fibre. More precisely, we introduce Ytterbium in the optical fibre as a gain medium localised on the maximum of intensity of the scar modes. After briefly recalling the relevance of a chaotic optical fibre as a device to visualise quantum chaos, we describe the amplification process of scars. We present some numerical results that demonstrate the selective amplification of scar modes, with an amplification rate proportional to the overlap between these modes and the gain area.

Optimal non-circular fiber geometries for image scrambling in high-resolution spectrographs

“…Based on the conclusions from the previous section and considering the results of other groups in the context of fiber lasers, 9,12 we opted for a fiber shape that shows chaotic dynamics. We have chosen a D-shape, where the straight cut occurs at 3/4 of the fiber diameter.…”

Modeling propagation in large deformed step-index fibers using a finite operator method

“…, 16], and involves investigation of chaotic light in the geometrical limit of ray-billiard systems. In asymmetric optical and microwave waveguides, the interference of chaotic rays scattered due to boundary deformations has been investigated extensively for asymmetric dielectric resonant cavities for application in directional emitters [17][18][19], and in active optical fibers [20][21][22] for selectively amplifying the modes in scars.…”