Coherent combining in multi-aperture reception for free-space communication applications
requires active phase alignment. Here, using 50/50-fiber-couplers and optically preamplified …

In free-space optical communication links, the combining of optical signals from multiple
apertures is a well-known method to collect more power for improved sensitivity or mitigation …

We experimentally demonstrate a tunable and reconfigurable optical correlator in
conjugation with coherent detection to simultaneously search multiple patterns in …

The key idea of this work is to treat the symbol-pattern-dependent inter-symbol-interference
(ISI) that is avoided in conventional single-symbol modulation systems as useful symbol …

We demonstrate a record QAM multiplicity of 1024 levels in a single-carrier coherent
transmission. A frequency-domain equalization technique and a back-propagation method …

Coherent digital combining technology using multiple small apertures has a lot of
advantages over doing so with a single large aperture, including the effective mitigation of …

In this paper, a new, to the best of our knowledge, scheme is proposed to mitigate the
atmospheric turbulence effect in coherent free-space optical (FSO) communications with 8 …

Coherent optical communication systems promise superior performance, but their realization
in real time also poses big technical challenges. After an introduction the potential of …

We demonstrate a single-ended colorless coherent receiver using symmetric 3x3 couplers
for optical hybrids. We show that the receiver can achieve colorless reception of fifty-five 112 …

In free space optical communication systems, multi-aperture coherent optical receivers
based on digital coherent beam combining (D-CBC) technique can provide exceptionally …