Patent ID: 9559771
Date: 2017-01-31
CPC Classifications: H04B,H04J

Claim:
1. An optical transmission device, comprising: a transmission unit configured to superimpose superimposition signals on a plurality of optical signals that have identical destinations and that have adjacent wavelengths and to transmit resultant signals as one communication signal, the superimposition signals being frequency-modulated signals; a filter unit configured to filter part of two optical signals having adjacent wavelengths from among the plurality of optical signals included in the communication signal; a detection unit configured to generate an electric signal of a detection level representing an optical intensity of the two optical signals that were filtered by the filter unit; and a control unit configured to execute a process in which identical superimposition signals are superimposed on the plurality of respective optical signals by controlling the transmission unit so as to adjust timings of superimposing the superimposition signals on the two optical signals respectively so that variation in the detection level becomes smaller.