Communication method, communication apparatus and communication system

A communication device comprising:

• a sensor that detects a distortion of a wavefront of a light signal;
• an analyzer that derives each of components from a higher-order component to a lower-order component in the distortion of the wavefront;
• a first controller that controls an inclination of a reflection surface of a first optical device that changes a propagation direction of the light signal, according to the lower-order component;
• and
• a second controller that controls a phase modulation operation using a second optical device that modulates a phase of the wavefront of the light signal of which the propagation direction has been changed, according to the higher-order component.

A communication system comprising:

• a first communication device;
• and
• a second communication device, wherein
• the first communication device includes
• a transmitter that transmits a light signal, and
• the second communication device includes
• a sensor that detects a distortion of a wavefront of a light signal arriving from the first communication device,
• an analyzer that derives each of components from a higher-order component to a lower-order component in the distortion of the wavefront,
• a first controller that controls an inclination of a reflection surface of a first optical device that changes a propagation direction of the light signal that has arrived, according to the lower-order component, and
• a second controller that controls a phase modulation operation using a second optical device that modulates a phase of the wavefront of the light signal of which the propagation direction has been changed, according to the higher-order component.

A communication system comprising:

• a first communication device;
• and
• a second communication device, wherein
• the first communication device includes
• a transmitter that transmits a light signal;
• a sensor that detects a distortion of a wavefront of a reference light signal transmitted from the second communication device,
• an analyzer that derives each of components from a higher-order component to a lower-order component in the distortion of the wavefront,
• a first controller that controls an inclination of a reflection surface of a first optical device that changes a propagation direction of the transmitted light signal, according to the lower-order component, and
• a second controller that controls a phase modulation operation using a second optical device that modulates a phase of the wavefront of the light signal of which the propagation direction has been changed, according to the higher-order component, and
• the second communication device includes
• a receiver that receives the light signal of which the phase has been modulated.