From the March 2021 Scientific American:
Optics. Traveling Photons. A laser-based system could boost deep-space data transfer.
'Laser communication could work with receivers about 20 centimeters across—the size of a personal pizza—and condensed laser beams can carry much more information than radio. But laser signals are transmitted at a lower power level, and processing them once they are received requires a daunting level of amplification.'
Why are laser signals used for long-distance communication transmitted at such a low power level? Such that they need extensive amplification?
Would it be too expensive or energy-intensive to shoot a powerful IR, visible or UV laser beam? Would the equipment be too big to fit on a spacecraft sent to Mars, or wherever?
Would a high-amplitude laser beam destroy its own equipment? ( I thought Donna Strickland won the Nobel for fixing this...)
Or would our atmosphere absorb or scatter the signal? But if so, how does lowering the amplitude get around this?
. . . . EXCITING UPDATE!!!: NASA just launched an object into space that could 'Revolutionize space communication'! It uses infrared lasers....
'NASA launches laser demo that could revolutionize space communication.'