Question: what is the difference between infrared and laser?
Answer: Any “light” with wavelengths longer than 700 nm is called infrared and is not normally visible (except sometimes as a dull deep red). ... In particular, common Optical Wireless laser wavelengths include 780 nm, 810 nm, 850 nm and 980 nm. Optical Wireless systems using LEDs normally operate between 800 nm and 900 nm.