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…
Read MoreDARPA’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…
Read More