ABSTRACT
Laser is a kind of light frequency electromagnetic wave with good coherence. Like the radio wave, it can be used as an information transmitting carrier. As laser possesses very high frequency, as high as 1013∼1015 Hz, the frequency band available is very wider and hence a great volume of information is transmitted. Furthermore, owing to the extremely short wavelength and extremely rapid transmission speed possessed by laser, what with the independent transmission characteristics of the optic wave, the 2-dimensional information on a plane can be instantly transmitted onto another with very high resolution, providing conditions for 2-D parallel optic information processing. So, laser is an ideal light source for transmitting information, including speech, language, images, and symbols.
