Patent ID: 8666243
Filing Date: 2014-03-04
Classification: H04J,H04Q

Abstract:
1. An optical transmission device capable of transmitting and receiving an optical signal with a next optical transmission device, the optical transmission device comprising: an optical transmitter for transmitting individually an adjustment optical signal and the optical signal, the optical signal being transmitted to the next optical transmission device without amplifying the optical signal, the adjustment optical signal having a predetermined optical level, the next optical transmission device adjusting gain for a transmission loss of the optical signal based on a loss of the adjustment optical signal during a transmission of the adjustment optical signal between the optical transmission device and the next optical transmission device; and an optical signal controller for sending instructions to the optical transmitter, one of the instructions being sent so as to stop transmission of the adjustment optical signal on the basis of a reception signal transmitted by the next optical transmission device, the reception signal being transmitted after calculation of an amount of loss of the adjustment optical signal during propagation from the optical transmission device to the next optical transmission device.