Wavelength division multiplexer using planar lightwave circuit

摘要

The present invention relates to a wavelength-division multiplexer employing a planar lightwave circuit in the wavelength-division multiplexer/demultiplexer of a telecommunication system. The multiplexer includes a planar lightwave circuit (200) having zigzagged waveguides (200a) through which optical signals are transmitted; an input optical fiber and output optical fibers successively connected with a plurality of ports of the zigzagged waveguides, respectively; and, a plurality of thin film filters (201), respectively, attached to the plurality of ports through an aligning procedure for passing wavelength components corresponding to preset central wavelengths thereof among a multitude of wavelength components inputted from the input optical fiber toward the output optical fibers.