| 摘要 |
The present invention is directed to the provision of a wavelength division multiplexing optical transmission apparatus and, more particularly, to a wavelength division multiplexing optical transmission apparatus having high wavelength stability unaffected by the temperature characteristics, aging, etc. of an arrayed-waveguide grating (AWG) and its peripheral components. The wavelength division multiplexing optical transmission apparatus comprises: an arrayed-waveguide grating 10 having operating input/output ports and an input dummy port; a light emitting means 21 for generating a pilot signal to be input to the input dummy port; a light detecting means 22 for monitoring the pilot signal contained in a wavelength division multiplexed signal output from the operating output port; and a temperature control circuit 11 for controlling the temperature of the arrayed-waveguide grating in such a manner as to cancel the amount of wavelength fluctuation occurring in the arrayed-waveguide grating and detected by monitoring the pilot signal.
|
