Patent ID: 7054563
Filing Date: 2006-05-30
Classification: H04B

Abstract:
1. A multi-channel optical communication system comprising: an optical transmitting apparatus including a retroreflector reflecting incident light in the direction of a source of the incident light and a modulator for modulating the light reflected by the retroreflector according to a transmission signal; and an optical receiving apparatus including a light emitter emitting light and a demodulator for demodulating from the light emitted from the light emitter and reflected from the retroreflector the transmission signal modulated by the modulator, the modulator including a plurality of reflection condition control devices arranged on a reflection plane of the retroreflector and capable of controlling optical total reflection independently of each other and a driver for separately controlling each of the reflection condition control devices according to the transmission signal, and the demodulator including a photoreceiver having a plurality of photo receptors arranged correspondingly to arrangement of the plurality of reflection condition control devices for receiving the reflected light and a signal demodulating circuit reconstructing the transmission signal from respective outputs of the plurality of photoreceptors.