Patent ID: 6658214
Filing Date: 2003-12-02
Classification: H04B

Abstract:
An optical space transmission apparatus comprising:a transmission means for sending out a transmission light beam modulated with a predetermined information signal to another optical space transmission apparatus disposed in a spaced relationship by a predetermined distance from said optical space transmission apparatus; a reception means for receiving a transmission light beam sent out from said another optical space transmission apparatus in a spaced relationship by a predetermined distance from said optical space transmission apparatus as a reception light beam; the transmission means further capable of transmitting information of an operation condition relating to reception of the reception light beam together with the information signal to said another optical space transmission apparatus; and a means for frequency multiplexing the information of the operation condition with the information signal, wherein the information of the operation condition at least includes information which directly or indirectly represents a received light amount of the reception light beam, information relating to a drive current of a laser diode associated with transmission means, and information relating to an inclination of a mirror associated with directing the transmitting light beam and the reception light beam.