University of Southern California

Hao Huang

Alan Eli Willner

Yongxiong Ren

Moshe Tur

Guodong Xie

Yan Yan

Yang Yue

Nisar Ahmed

Moshe J Willner

An adaptive optics compensation approach for an OAM multiplexed FSO communication system is described, in which a Gaussian beam is used to probe the turbulence-induced wavefront distortions and derive the correction pattern for compensating the OAM beams. Using this approach, we demonstrate simultaneous compensation of multiple OAM beams each carrying a 100-Gbit/s data channel through emulated atmospheric turbulence. The results indicate that the turbulence-induced crosstalk and power penalty could be efficiently mitigated by &#x2dc;12.5 dB and &#x2dc;11 dB respectively.

Adaptive optics based simultaneous turbulence compensation of multiple orbital angular momentum beams

In at least one aspect, a device for Orbital Angular Momentum (OAM) based optical communication includes a first spatial light modulator configured to down-convert a first plurality of higher-order OAM modes from a communication signal to a second plurality of higher-order OAM modes and a first Gaussian mode, a second spatial light modulator configured to drop the first Gaussian mode and add a second Gaussian mode to the second plurality of higher-order OAM modes, and a third spatial light modulator configured to up-convert the second plurality of higher-order OAM modes and the second Gaussian mode to a third plurality of higher-order OAM modes for further communications.

Systems and techniques for orbital angular momentum based reconfigurable switching

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Hao Huang