Capacity Trends and Limits of Optical Communication Networks

Supersymmetric mode converters

“…1). Along these lines, the superpotential W ¼ À q/qX(lnc 1 (X)) is obtained as logarithmic derivative of the fundamental mode c ð1Þ 1 ðXÞ of the original structure Dn (1) . The corresponding SUSY partner index distribution is then given by…”

“…In the tight binding approximation, the evolution of guided light in a photonic lattice is described by equation (1). The respective eigenvalue problem can then be written in the form Ha ¼ la, where the discrete Hamiltonian H is a Hermitian operator composed of the propagation constants b n and the coupling coefficients C n,n þ 1 ¼ C n,n À 1 C n .…”

Multi-channel mode converters based on in-line fiber modal interferometer

“…The standard single-mode fiber (SMF) optical network is gradually approaching the theoretical capacity limitation in the last decade [1,2]. New key technological breakthrough is imminently required to exploit the spatial domain for substantially increasing the per-fiber capacity since all other physical signaling dimensions (i.e.…”

Impact of inter-modal four-wave mixing on the performance of mode- and wavelength-division-multiplexing systems

“…Mode-division multiplexing (MDM) over few-mode fibres (FMFs) has been proposed as a next-generation solution to overcome the impeding installed capacity exhaustion of current single-mode fibres (SMFs) [1]. However, the guidance of multiple modes introduce impairments absent in SMFs, namely: differential mode delay (DMD) [2], [3], linear mode coupling (XT) [4] and inter-modal (IM) nonlinear (NL) effects [5]- [9].…”