Radiation of leaky modes existing in anisotropic waveguides can be cancelled by destructive interference at special propagation directions relative to the optical axis orientation, resulting in fully bound states surrounded ...

Quantum computing is an exciting new technology that will allow to solve some problems that current computers cannot do. However, most of the technologies being researched for quantum computing need ultra-low temperatures ...

A new kind of resonator based on a nonlinear directional coupler with feedback is presented. The steady states are found and the map of the system is iterated, showing the existence of bistability, period doubling and ...

We propose to take advantage of the sparse structure of the control matrix in adaptive optical systems in order to allow the acceleration of the control loop in real time wavefront correction. The idea is using the local ...

Wavefront distortions of optical waves propagating through the turbulent atmosphere are responsible for phase and amplitude fluctuations, causing random fading in the signal coupled into single-mode optical fibers. Wavefront ...

In the present study it is investigated the applicability of spectrally resolved reflectance at a certain distance from the incident beam to determine the optical coefficients of multi-layered tissues. The main motivation ...

The propagation characteristics of the leaky modes in planar anisotropic waveguides with a multilayer structure have been investigated by means of a compact rigorous formalism. The leakage losses and leaky transition angle ...

A new class of resonant exchange of power among three co-propagating modes in dielectric optical waveguides exhibiting Kerr-like nonlinearity is reported. Unlike the coupling of modes travelling in different, spatially ...

A comprehensive analysis of the symmetric nonlinear directional coupler as a function of the excitation conditions is reported. The analysis is based on a coupled-mode technique in normalized (dimensionless) parameters, ...