Coherent light propagation through multicore optical fibers with linearly coupled cores

Topological Charge Switch in Active Multi‐Core Fibers

“…In general, coupling coefficients in discrete optical systems are complex due to material losses that cannot be avoided especially in long transmission links. Detailed analysis on this issue have been done in [36,47] for silica based MCF showing that the losses are dominantly governed by the material absorption of the cores. Example presented here is MCF with 6 periphery cores.…”

“…At high signal power MCF presents an example of nonlinear discrete physical system, interesting both for fundamental science [15,[31][32][33][34]36,37] and for various potential practical applications in nonlinear photonic devices. [24,25,[38][39][40][41][42][43] The case of loss-gain in MCFs in a discrete PT-symmmetric configuration has also attracted attention recently.…”

Optical vortices in waveguides with discrete and continuous rotational symmetry

“…An example of axial symmetric discrete optical system where the translation symmetry is broken in the azimuthal direction, is a multicore fiber with cores concentrically arranged in the form of a ring [40,[84][85][86][87][88]. Inclusion of the central core breaks also the translation symmetry in the radial direction.…”

“…Multicore fibers recently attracted a great deal of interest in the field of high-capacity communication systems [32,34,89,90]. However, their applications can go well beyond optical communications due their ability to provide coherent transport of light that might be important for nonlinear devices [40,[84][85][86][87][88], coherent beam combining and new concepts and techniques in the field of high-power fibre lasers [91][92][93][94]. The light vortices -ring shaped modes guided by the MCF with linearly coupled circular array of cores -are shown to be promising candidates for these purposes.…”

A new concept for design of photonic integrated circuits with the ultimate density and low loss

“…Scaling up of the number of ports provides access to the high-dimensional Hilbert spaces suitable for operations on qudits, which have been marked as the next step towards the high-dimensional quantum computing [29]. Further expansion of the commensurability concept to the second spatial dimension can be exploited in construction of the multi-layer on-chip interconnects as well as the spatially multiplexed fibre-to-chip interconnects [47]. Finally, the passive CWGAs considered here lend themselves to reconfiguration and activation by standard techniques [48], and hence to design of new monolithic all-WGA processors and flexible sensing platforms.…”