Optical coherent beam control based on microwave photonics technologies

Optical coherent beam control is attractive technique to realize precise and high-speed control of a far field beam pattern, to increase optical power with high beam brightness, and to ensure robustness on optical communication link between satellites. In the above applications optical phase and intensity of single or multiple beams have to be precisely detected and distinguished. Microwave photonics perform important roles for extraction of this optical information. We describe coherent beam combining technology of multiple phase modulated beams and optical coherent receiver technology for inter-satellite communication as our recent activities.