BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:Australia/Victoria BEGIN:DAYLIGHT DTSTART:20201004T030000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=10 TZNAME:AEDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20210404T020000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=4 TZNAME:AEST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20201118T110254Z UID:F8E3BE67-E429-43E3-9D6E-CAB7B5C3D65C DTSTART;TZID=Australia/Victoria:20201118T170000 DTEND;TZID=Australia/Victoria:20201118T183000 DESCRIPTION:It is well known that coherent light beams have an angular mome ntum associated with them. This is the well-known phenomenon of polarizati on and is the direction of oscillation of the electric field of the electr omagnetic wave. In the quantum mechanical view of light\, it is associated with the intrinsic spin of the photons. From a communications engineering viewpoint\, this enables two orthogonal channels in\, for instance satell ite television\, thus doubling the channel capacity of a given frequency.\ n\nIn recent years it has been recognized that there is another angular mo mentum associated with a coherent light beam. This is called orbital angul ar momentum (OAM) and is also associated with a quantum mechanical paramet er. It corresponds to solutions to Maxwell's equations with helical wavefr onts and\, unlike polarization\, can\, in principle\, take infinitely many orthogonal states. The OAM of a coherent beam can be any integer. Creatio n of low integer OAM states is not very difficult with both metamaterials and computer generated holograms being used. Similar devices can be used t o filter light beams to detect such states.\n\nThe ability to reliably cre ate and detect such states holds great potential for communications using electromagnetic waves\, both in free space and in optic fibres. Effectivel y\, it is possible to create a number of orthogonal communication channels at a given frequency in an optical fibre.\n\nOur speaker will talk about the theoretical ideas behind this new technology\, as well as a few practi cal aspects and uses in communications.\n\nSpeaker(s): Professor Bill Mora n\, \n\nMelbourne\, Victoria\, Australia\, 3000\, Virtual: https://events. vtools.ieee.org/m/245736 LOCATION:Melbourne\, Victoria\, Australia\, 3000\, Virtual: https://events. vtools.ieee.org/m/245736 ORGANIZER:golnar.khomami@gmail.com SEQUENCE:3 SUMMARY:Orbital Angular Momentum for Communications URL;VALUE=URI:https://events.vtools.ieee.org/m/245736 X-ALT-DESC:Description: <br /><p class="x_MsoNormal">It is well known that coherent light beams have an angular momentum associated with them. This i s the well-known phenomenon of polarization and&nbsp\; is the direction of oscillation of the electric field of the electromagnetic wave.&nbsp\; In the quantum mechanical view of light\, it&nbsp\; is associated with the in trinsic spin of the photons. From a communications engineering viewpoint\, this enables two orthogonal channels in\, for instance satellite televisi on\, thus doubling the channel capacity of a given frequency. &nbsp\;</p>\ n<p class="x_MsoNormal">In recent years it has been recognized that there is another angular momentum associated with a coherent light beam. This is called orbital angular momentum (OAM) and is also associated with a quant um mechanical parameter. It corresponds to solutions to Maxwell's equation s with helical wavefronts and\, unlike polarization\, can\, in principle\, take infinitely many orthogonal states. The OAM of a coherent beam can be any integer. Creation of low integer OAM states is not very difficult wit h both metamaterials and computer generated holograms being used. Similar devices can be used to filter light beams to detect such states.&nbsp\;</p >\n<p class="x_MsoNormal">&nbsp\;The ability to reliably create and detect such states holds great potential for communications using electromagneti c waves\, both in free space and in optic fibres. Effectively\, it is poss ible to create a number of orthogonal communication channels at a given fr equency in an optical fibre.&nbsp\;</p>\n<p class="x_MsoNormal">Our speake r will talk about the theoretical ideas behind this new technology\, as we ll as a few practical aspects and uses in communications.&nbsp\;</p>\n<p>& nbsp\;</p> END:VEVENT END:VCALENDAR