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2. Satellite laser ranging - Wikipedia

   en.wikipedia.org/wiki/Satellite_laser_ranging

   The laser pulse can also be reflected by the surface of a satellite without a retroreflector, which is used for tracking space debris. [1] Satellite laser ranging is a proven geodetic technique with significant potential for important contributions to scientific studies of the earth/atmosphere/ocean system. It is the most accurate technique ...

3. Optical wireless communications - Wikipedia

   en.wikipedia.org/wiki/Optical_Wireless...

   Short range: wireless body area network (WBAN) and wireless personal area network (WPAN) applications under standard IEEE 802.15.7, underwater communications. [10] [11] Medium range: indoor IR and visible light communications (VLC) for wireless local area networks (WLANs) and inter-vehicular and vehicle-to-infrastructure communications.

4. Free-space optical communication - Wikipedia

   en.wikipedia.org/wiki/Free-space_optical...

   On April 28, 2023, NASA and its partners achieved 200 gigabit per second (Gbit/s) throughput on a space-to-ground optical link between a satellite in orbit and Earth. This was achieved by the TeraByte InfraRed Delivery (TBIRD) system, mounted on NASA's Pathfinder Technology Demonstrator 3 (PTD-3) satellite. [33]

5. SpaceX to sell satellite laser links that speed in-space ...

   www.aol.com/news/spacex-says-plans-sell...

   SpaceX's thousands of Starlink satellites in low-Earth orbit use inter-satellite laser links to pass data between one another in space at the speed of light, allowing the network to offer broader ...

6. Lidar - Wikipedia

   en.wikipedia.org/wiki/Lidar

   Lidar (/ ˈ l aɪ d ɑːr /, also LIDAR, LiDAR or LADAR, an acronym of "light detection and ranging" [1] or "laser imaging, detection, and ranging" [2]) is a method for determining ranges by targeting an object or a surface with a laser and measuring the time for the reflected light to return to the receiver.

7. Home security - Wikipedia

   en.wikipedia.org/wiki/Home_security

   Door and window sensors are also implemented in most home security systems. One part of the system is installed on the door or window itself while the other part is installed on the frame of the door or window. The two part system connects securely when a door or window is closed, creating a security circuit. [5]