OPTICAL TRANSMISSION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an optical transmission device easily generating multi-value signals at a low cost.SOLUTION: An optical transmission device 100a modulating data into an optical signal to transmit, using an optical communication quantum encryption by multi-value intensity modulation includes: a Running key generation part 104 generating a Running key on the basis of a common key 102; a multi-level signal generation part 106a generating a multi-value signal from transmitted data on the basis of a Running key generated by the Running key generation part; a light source generation part 108a; a light source control part 120 controlling the optical signal level of a light source generated by the light source generation part on the basis of a Running key generated by the Running key generation part; and an optical signal modulation part 110a modulating an optical signal input from the light source generation part into an optical signal having a different optical signal level representing a multi-value signal input from the multi-level signal generation part.SELECTED DRAWING: Figure 1