Do the twist: schematic of multiplexed antennas emitting coherent light with orbital angular momenta. (Courtesy: Kanté Group, UC Berkeley) A compact, integrated light source that simultaneously produces multiple laser beams with different, very high orbital angular momenta has been unveiled by US researchers. The technology may mark a significant step towards orbital angular momentum multiplexing
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WASHINGTON — NASA has sharply increased the prices it charges commercial users of the International Space Station for cargo and other resources, a move that has left some companies confused and frustrated. NASA announced Feb. 25 that it was revising the commercial marketing pricing policy it first published in June 2019 as part of a
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