Researchers at the University of California, Berkeley have outlined details of an optical antenna they claim could provide almost limitless bandwidth.
They suggest the key to the breakthrough is a method of being able to take full advantage of the orbital angular momentum (OAM) properties of a coherent light source, thus enabling multiplexing, or simultaneous transmission.
According to Boubacar Kante, the principal investigator of the Berkeley project “it is the first time that lasers producing twisted light have been directly multiplexed.” He is an associate professor in the university’s Electronic Engineering and Computer Sciences Department, and the initial results of the work have just been published in Nature Physics.
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