Information transfer rates in optical communications may be dramatically increased by
making use of spatially non-Gaussian states of light. Here, we demonstrate the ability of …

Modeling of a class of nonstationary signals with randomly time-varying amplitude and
parametric polynomial phase is addressed. A novel approach is proposed for the estimation …

Automated detection of orbital angular momentum (OAM) can tremendously contribute to
quantum optical experiments. We develop convolutional neural networks to identify and …

In an active sonar system setting, a novel method is evaluated that extracts range and
Doppler information from a Doppler-spread active sonar echo. The Doppler spreading is …

This article briefly reviews the elementary concepts of the quantum communication theory.
Specific topics on some of the optical communications by utilizing quantum nature of light …

Modal noise becomes a serious problem in multimode optical fiber systems. It is said that
there are two main causes for modal noise, one being the optical source and the other fiber …

The properties of polarization noise caused by external disturbances in intensity
modulation/direct detection transmission systems that have polarization-dependent optical …

This letter proposes an improved polarization diversity method for heterodyne/coherent
optical transmission systems. It is theoretically clarified that this method can reduce the noise …