Artificial optical radiation is electromagnetic radiation generated by man-made devices and includes visible, ultraviolet (UV) and infrared (IR) light. These radiations find application in various fields, such as lighting, medicine, industry and research. The distinction between coherent and non-coherent radiation within these artificial sources depends on their nature and mode of propagation.
Coherent artificial optical radiation:
Definition:The electromagnetic waves emitted have the same frequency, wavelength and phase, propagating in a synchronised manner.
Main sources:Lasers: These are the most typical example and are used in applications such as surgery, optical telecommunications, 3D scanning and visual shows.
Non-coherent artificial optical radiation:
Definition:Electromagnetic waves have random frequencies, wavelengths and phases, propagating in a disordered manner.
Main sources: Incandescent, LED and fluorescent lamps: Used for general and decorative lighting.
Artificial natural light: Simulated in some devices for medical and photographic applications.
