GUWAHATI: A research team from the Indian Institute of Technology (IIT) Guwahati has developed a novel free-space optical communication system for information transfer.
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In free-space communication, data in the form of voice, text, or image is transmitted using light wirelessly rather than through optical fibres and it represents the next generation of communications technology.
The team was led by Dr. Bosanta Ranjan Boruah, Department of Physics, IITG, and Dr. Santanu Konwar, Assistant Professor at the Department of Physics, Abhayapuri College.
The result of the research was published in “Communications Physics", a highly reputed journal belonging to Nature Publishing Group.
IIT Guwahati researchers have for the first time, used orthogonal spatial light modes called Zernike modes to encode the data and to transmit the same robustly in the form of the phase profile of a laser beam.
“In addition to eliminating errors in communication, our system is also insulated from hacking and interloping, because the receiver decodes the transmitted beam by measuring the phase and not the power of the light beam, with prior knowledge about the strength and types of Zernike modes used, which make it more secure than wired and other conventional wireless forms of communication”, said Dr. Santanu Konwar.