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Detectors and sensors

Detectors and sensors

Four-wave mixing could boost optical communications in space

09 Nov 2024
Optical receiver
Four-wave mixing A weak optical signal (red) from a spacecraft transmitter can be amplified noise-free when it encounters two pump waves (blue and green) in a receiver on Earth. (Courtesy: Chalmers University of Technology/Rasmus Larsson)
A new and practical approach to the low-noise amplification of weakened optical signals has been unv

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Sam Jarman is a science writer based in the UK
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