Wavelength multi/demultiplexer
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United States of America Patent
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Dec 25, 2007
Grant Date -
Feb 2, 2006
app pub date -
Sep 10, 2004
filing date -
Sep 12, 2003
priority date (Note) -
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Abstract
Disclosed is a wavelength multi/demultiplexer for separating two wavelength bands with a narrow wavelength spacing. A dielectric multilayer filter is provided in an intersection portion where two optical waveguides intersect each other and separates incident light to the dielectric multilayer filter to transmitted light and reflected light. Here, the distance X from the multilayer surface on the light-incident side of the dielectric multilayer to the central intersection point of the two intersecting optical waveguides is arranged to satisfy 0.ltoreq.X.ltoreq.d/2 (where 'd' represents the thickness of the dielectric multilayer). With this configuration, a multi/demultiplexer can be realized that shows good wavelength response without spectral degradation even for two wavelengths having narrow wavelength spacing.
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