Typical lasers used in Free Space Optics (FSO, Laser, Infrared, Optical Wireless) are edge-emitting semiconductor devices, running at 785, 980 or 1550nm. Various output powers and wavelengths are available. Lasers have the advantages of high output powers, high modulation rates, and if cooled, long-term reliability.
This diagram shows the structure of a typical edge-emitting laser. The dimensi