| 摘要 |
PURPOSE: To greatly increase the transmission output and reduce the weight of an optical communication equipment by optically amplifying each branch laser signal light subjected to phase control up to an output level necessary for transmission by the use of an optical amplifier and transmitting the amplifier signal light through a small-sized telescope. CONSTITUTION: The laser signal light emitted from a main oscillation laser part 1 is branched off into many laser signal beams by a branching device 2 and led to the phase controllers 4-1 to 4-9 via the optical fibers 3-1 to 3-9 respectively to undergo the phase control. Then the laser signal beams which are controlled by the controllers 4-1 to 4-9 are led to the optical amplifiers 5-1 to 5-9 and optically amplified up to the necessary output levels respectively. These amplified signal beams are led to the small-sized telescopes 6-1 to 6-9 and sent to the opposite party side of communication. In regard of these phase control operations performed by the phase controllers 4, the phase difference caused by the optical path length difference is corrected so that the reduction of light quantity due to the mutual interference of light beams that is caused by the phase difference of optical antennas can be minimized in a remote place. |
