An optical transmitter and an optical transmission method

Example discloses an optical transmitter and an optical transmission method according to the present invention. Example embodiments of the present invention includes: a directly modulated laser array and the array of micro-ring group, a directly modulated laser array may output a multi-channel optical signals, each corresponding to a directly modulated laser is provided with a circular waveguide and a first set of waveguides, each group a circular waveguide corresponding to a portion of the optical signal from its own direct modulation of the laser output can be coupled into the waveguide with a second, converging light from the respective signal group by the second circular waveguide and the output waveguide, an array of micro-ring group filtering may also be achieved both multiplexed effectively reducing the number of components and to reduce the volume of the optical transmitter, reducing the cost.