FIELD: optical communication systems.
SUBSTANCE: proposed demultiplexer that has waveguide layer, geodetic lens optically coupled with single-mode input optical fiber and with dispersion component in the form of ordered waveguide diffraction grating, and output geodetic lens optically coupled with dispersion component and with output waveguides, all formed on single substrate, is characterized in that all channel waveguides of dispersion component are equal in length and each channel waveguide has two sections of different thickness, length difference of respective sections for any pair of adjacent channel waveguides being constant value.
EFFECT: enhanced useful-signal optical power due to reduced precision of dispersion component manufacture; reduced crosstalk channel noise due to reduced regular and random phase errors.
1 cl, 2 dwg
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