Patent ID: 7327771

Claim:
A PLC-based wavelength-tunable WDM-PON system with an optical wavelength alignment function, the WDM-PON system comprising: a PLC platform; a semiconductor chip comprising an active region generating light and a passive region located in front of the active region using a directional coupling principle for vertically coupling the light generated in the active region to another waveguide; a planar lightwave circuit (PLC) waveguide is formed on the PLC platform, and in one portion of which a PLC platform semiconductor chip is surface mounted by a passive alignment method, and at a predetermined location of PLC waveguide a waveguide Bragg grating (WBG) is formed; a directional coupler transferring an optical power by permitting the passive region to approach the PLC waveguide; a heater terminal, which is formed on the WBG in order to control a temperature of the WBG; and a V-groove, which is formed on the PLC platform for attaching an optical fiber into the end of the PLC waveguide.