Why doesn't NASA use light as a form of long distance communication?

Why doesn't NASA use lasers as a device of communication? They could use a laser to beam a morse code of sorts (short bursts of light dot longer bursts dash) at the speed of light to far away planets/ships.

Submitted January 30, 2017 at 07:48PM by matthewback1 http://ift.tt/2jwQFxg