| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical communication device that easily attains optical communication with high accuracy without the need for using a precise tracking means causing large size, heavy weight, increase in a failure rate and quickening deteriorating period of operation accuracy. SOLUTION: An optical antenna 10 receives a signal light L1 from a communication opposite station, a photonic crystal 20 is placed on a propagation path of an optical processing signal light L2 obtained by distributing the signal light L1 by a beam splitter 105 and a dispersion face is set to the photonic crystal 20 to propagate the optical processing signal light L2 nearly in the same direction in the inside of the crystal independently of the propagation direction so as to obtain received signals whose propagation direction is arranged from the photonic crystal 20. |
