Patent ID: 8385750

Claim:
An optical transmission device comprising: an optical transmitter for outputting an output beam in accordance with an input signal; detecting means for detecting a physical quantity related to wavelength of the output beam output by said optical transmitter; control value selecting means for storing a group of control values and selecting a control value from the group of control values based on the physical quantity detected by said detecting means; wavelength control means for controlling the wavelength of the output beam output by said optical transmitter in accordance with the control value selected by said control value selecting means; associated wavelength storing means for storing associated wavelength information specifying a relationship between the control values in the group of control values and associated wavelengths, each associated wavelength being the wavelength of the output beam output by said optical transmitter at a respective one of the control values under control of said wavelength control means; and informing means for informing an external device of the associated wavelength associated with the control value selected by said control value selecting means, the associated wavelength being included in the associated wavelength information.