Optical transmission device,optical transmission method, and recording medium thereof

An optical transmission device that is installed at a node of a network and that performs transmission of an optical signal, the optical transmission device comprising:

• transmission means for transmitting the optical signal to an optical transmission device at the next node without amplifying the optical signal;
• adjustment optical signal generating means for generating an adjustment optical signal used by a reception-side optical amplifier in the optical transmission device at the next node to adjust gain for a transmission loss of the optical signal;
• and
• adjustment optical signal transmission controlling means for controlling the transmission means to transmit the adjustment optical signal generated by the adjustment optical signal generating means to the reception-side optical amplifier in the optical transmission device at the next node, and to stop transmission of the adjustment optical signal when the optical transmission device receives, from the reception-side optical amplifier, a gain-adjustment-completion signal for notifying completion of gain adjustment using the adjustment optical signal.

An optical transmission method that is installed at a node of a network and that performs transmission of an optical signal, the optical transmission method comprising:

• a transmission step of transmitting the optical signal to an optical transmission device at the next node without amplifying the optical signal;
• an adjustment optical signal generating step of generating an adjustment optical signal used by a reception-side optical amplifier in the optical transmission device at the next node to adjust gain for a transmission loss of the optical signal;
• and
• an adjustment optical signal transmission controlling step of controlling transmission so that the adjustment optical signal generated at the adjustment optical signal generating step is transmitted to the reception-side optical amplifier in the optical transmission device at the next node, and so that transmission of the adjustment optical signal is stopped when the optical transmission device receives, from the reception-side optical amplifier, a gain-adjustment-completion signal for notifying completion of gain adjustment, using the adjustment optical signal.

An optical transmission program causing a computer serving as an optical transmission device that is installed at a node of a network and that performs transmission of an optical signal to execute an optical transmission method, the optical transmission method comprising:

• a transmission step of transmitting the optical signal to an optical transmission device at the next node without amplifying the optical signal;
• an adjustment optical signal generating step of generating an adjustment optical signal used by a reception-side optical amplifier in the optical transmission device at the next node to adjust gain for a transmission loss of the optical signal;
• and
• an adjustment optical signal transmission controlling step of controlling transmission so that the adjustment optical signal generated at the adjustment optical signal generating step is transmitted to the reception-side optical amplifier in the optical transmission device at the next node, and so that transmission of the adjustment optical signal is stopped when the optical transmission device receives, from the reception-side optical amplifier, a gain-adjustment-completion signal for notifying completion of gain adjustment using the adjustment optical signal.