Related Experiment Video
Updated: Mar 21, 2026

Bringing the Visible Universe into Focus with Robo-AO
Published on: February 12, 2013
Compensation of a distorted N-fold orbital angular momentum multicasting link using adaptive optics
Abstract:
By using an adaptive feedback correction technique, we experimentally demonstrate turbulence compensation for free-space four-fold and eight-fold 16-ary quadrature amplitude modulation (16-QAM) carrying orbital angular momentum (OAM) multicasting links. The performance of multicasted OAM beams through emulated atmospheric turbulence and adaptive optics assisted compensation loop is investigated. The experimental results show that the scheme can efficiently compensate for the atmospheric turbulence induced distortions, i.e., reducing power fluctuation of multicasted OAM channels, suppressing inter-channel crosstalk, and improving the bit-error rate (BER) performance.
Related Concept Videos
Conservation of Angular Momentum: Application
Conservation of Angular Momentum
Rotation with Constant Angular Acceleration - II
The first...
Angular Momentum about an Arbitrary Axis
The velocity of a mass element comprises its translational velocity and the relative velocity instigated by the body's rotation. Substituting the velocity equation into...
Distance Corrections
Rotation with Constant Angular Acceleration - I
Using our intuition, we can begin to see how rotational quantities such as angular displacement, angular velocity, angular acceleration, and time are related to one another. For example, if a flywheel...

