Wavelength division multiplexing optical transmission apparatus

Details Wavelength division multiplexing optical transmission apparatus Wavelength division multiplexing optical transmission apparatus

2005-03-15

2005-03-15

Kim, Ellen E. (Department: 2874)

Optical waveguides

With optical coupler

Plural

C385S037000, C359S199200

Reexamination Certificate

active

06868200

ABSTRACT:
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 grating10having operating input/output ports and an input dummy port; a light emitting means21for generating a pilot signal to be input to the input dummy port; a light detecting means22for monitoring the pilot signal contained in a wavelength division multiplexed signal output from the operating output port; and a temperature control circuit11for 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.

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