Laser Communications Could Be 10 to 100X Faster - New NASA Mission | Video

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The Laser Communications Relay Demonstration (LCRD) is set to launch in 2019 and will put humanities knowledge of manipulating photons to the test. Building off of the previous Lunar Laser Communications Demonstration (LLCD), the LCRD will examine the longevity of this emerging technology.

Credit: NASA's Goddard Space Flight Center/Amber Jacobson, producer
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It is my understanding that very powerful lasers are used to measure the distance to the moon. Large telescopes are needed to detect the returning signal. The returning signal that is detected is quite small, and multiple pulses of laser are sent and detected to get a good measurement. This is because of our atmosphere.
Lasers may be a good way to communicate between satellites provided you can point the transmitter and receiver with the precision required.
The power requirements for a laser on a satellite to send a detectable signal to a ground based telescope at a high rate will be large. I don't think this will work.

ccdimage
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How is laser communication faster than antenna communication while they both travel through space at the speed of light? Any explanation?

mohamedkhlifi