Optical transmitter, optical communication device, optical communication system and optical transmission method

The present invention makes it possible to store a plurality of services and transmit the stored plurality of services to a corresponding transmission device. An optical transmitter according to the present invention and equipped with: a sub-carrier adjustment means for outputting a sub-carrier to a plurality of output ports on the basis of a control signal; an encoding processing means for mapping client data on a plurality of output lanes on the basis of the control signal; a plurality of modulation means for modulating a sub-carrier inputted through a corresponding output port by using the client data inputted through a corresponding output lane, and outputting a modulated signal; and a control means for generating and outputting the control signal on the basis of transmission information.