Optical communication system, optical transceiver, optical communication method, and non-transitory computer readable medium

An optical communication method comprising:

• by a first optical transceiver, first outputting a first optical signal while switching a wavelength of the first optical signal to an optical fiber that acts as a medium for carrying single-fiber bi-directional communication between the first optical transceiver and an opposing second optical transceiver;
• by the second optical transceiver, identifying the wavelength of the received first optical signal when the wavelength of the first optical signal is switched to a receivable wavelength, and second outputting a second optical signal having a wavelength determined on a basis of an identification result to the optical fiber;
• by the first optical transceiver when the first optical transceiver receives the second optical signal from the optical fiber, stopping the switching of the wavelength of the first optical signal;
• by the first optical transceiver, stopping the outputting of the first optical signal in a case where the second optical signal is not received successfully from the optical fiber even after switching the wavelength of the first optical signal a predetermined number of times;
• in a case where the second optical transceiver is connected after the outputting of the first optical signal is stopped,
• by the second optical transceiver, third outputting the second optical signal to the optical fiber while switching a wavelength of the second optical signal;
• by the first optical transceiver, identifying the wavelength of the received second optical signal when the wavelength of the second optical signal is switched to the receivable wavelength, and fourth outputting an optical signal having a wavelength determined on a basis of an identification result to the optical fiber as the first optical signal;
• and
• by the second optical transceiver when the second optical transceiver receives the first optical signal from the optical fiber, stopping the switching of the wavelength of the second optical signal.

A non-transitory computer readable medium storing a first program causing a control computer provided in an optical transceiver to execute a first process comprising:

• switching a wavelength of a first optical signal to be outputted to an optical fiber that acts as a medium for carrying single-fiber bi-directional communication between the optical transceiver and an opposing other optical transceiver;
• stopping the switching of the wavelength of the first optical signal when the second optical signal having a wavelength pre-associated with the wavelength of the first optical signal and outputted when the other optical transceiver received the first optical signal is received;
• stopping the outputting of the first optical signal in a case where the second optical signal is not received successfully from the optical fiber even after switching the wavelength of the first optical signal a predetermined number of times;
• and
• identifying the wavelength of the received second optical signal when the wavelength of the second optical signal is switched to a receivable wavelength after the outputting of the first optical signal is stopped, and outputting an optical signal having a wavelength determined on a basis of an identification result to the optical fiber as the first optical signal.