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High-Capacity Optical Communications using Multiplexing of Multiple Orbital-Angular-Momentum Beams
Start Date: 3/22/2017Start Time: 4:00 PM
End Date: 3/22/2017End Time: 5:00 PM
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Event Description:
Presented by: Alan Willner, University of Southern California

Abstract: Optical communications has historically experienced tremendous capacity growth by multiplexing many channels and transmitting them simultaneously. Recently, the community has turned to research the possibility of space-division-multiplexing (SDM) as the next domain to exploit, and multiple spatially overlapping orthogonal modes can achieve a subset called mode-division-multiplexing (MDM). Indeed, the ability to multiplex multiple data-carrying modes over the same physical medium represents the potential for increasing system capacity and spectral efficiency.

Generating different amounts of orbital-angular-momentum (OAM) on different optical beams has emerged as a technique for such mode multiplexing. A beam can carry OAM if its phase front twists in a helical fashion as it propagates, and the amount of OAM corresponds to the number of 2*pi phase shifts that occur in the azimuthal direction. Each OAM beam is orthogonal to other beams, and such beams can be efficiently multiplexed, transmitted, and demultiplexed with little inherent crosstalk. This presentation will explore the achievements of and challenges to OAM-based optical and millimeter-wave communication systems, including transmission, turbulence compensation, and link design.

Coffee, tea and cookies will be available in DUAN G1B31 beginning at 3:45 p.m.
Contact Information:
Name: Department of Physics
Phone: 303-492-6952
Email: physics@colorado.edu
This event is open to
  • Students
  • Faculty
  • Staff
  • Graduate Students
  • Alumni

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