Editing Multiplexing (section)

===Orbital angular momentum multiplexing===
{{update section|reason=see [[Talk:Multiplexing#Orbital_angular_momentum_multiplexing_section_needs_updating]]|date=August 2024}}
[[Orbital angular momentum multiplexing]] is a relatively new and experimental technique for multiplexing multiple channels of signals carried using electromagnetic radiation over a single path.<ref>{{Cite journal|last1=Tamburini|first1=Fabrizio|last2=Mari|first2=Elettra|last3=Sponselli|first3=Anna|last4=Thidé|first4=Bo|last5=Bianchini|first5=Antonio|last6=Romanato|first6=Filippo|date=2012-01-01|title=Encoding many channels on the same frequency through radio vorticity: first experimental test|url=http://stacks.iop.org/1367-2630/14/i=3/a=033001|journal=New Journal of Physics|language=en|volume=14|issue=3|pages=033001|doi=10.1088/1367-2630/14/3/033001|issn=1367-2630|arxiv=1107.2348|bibcode=2012NJPh...14c3001T|s2cid=3570230}}</ref> It can potentially be used in addition to other physical multiplexing methods to greatly expand the transmission capacity of such systems. {{As of|2012}} it is still in its early research phase, with small-scale laboratory demonstrations of bandwidths of up to 2.5&nbsp;Tbit/s over a single light path.<ref>{{cite news|url=https://www.bbc.co.uk/news/science-environment-18551284|title='Twisted light' carries 2.5 terabits of data per second|work=BBC News|date=2012-06-25|access-date=2012-06-25}}</ref> This is a controversial subject in the academic community, with many claiming it is not a new method of multiplexing, but rather a special case of space-division multiplexing.<ref>{{cite journal|last1=Tamagnone|first1=Michele|last2=Silva|first2=Joana S.|last3=Capdevila|first3=Santiago|last4=Mosig|first4=Juan R.|last5=Perruisseau-Carrier|first5=Julien|title=The orbital angular momentum (OAM) multiplexing controversy: OAM as a subset of MIMO|journal=2015 9th European Conference on Antennas and Propagation (EuCAP)|date=2015|pages=1–5}}</ref>