DARPA develops next-gen fiber optics

By Jim Destefani / July 30, 2013

DARPA’s COUGAR hollow core optical fibers transmit light at 99.7 percent its speed in air, according to the agency. Credit: DARPA. Optical fibers typically consist of a transparent core surrounded by a transparent cladding material. The outer material has a lower index of refraction than the core material, thus trapping light in the core by…

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