Optical multi-demultiplexer

An arrayed-waveguide grating type optical multi-demultiplexer (10) includes input waveguides (12), a first slab waveguide (13), a channel waveguide array (14), a second slab waveguide (15), and output waveguides (16). A pair of different refractive index regions (40), each having a refractive index...

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Bibliographic Details
Main Authors MASUDA, MICHIYA, NAKANO, HISAMATSU, YAMAUCHI, JUNJI, TAZAWA, RYOUICHI, YAMAMOTO, YUICHI
Format Patent
LanguageEnglish
French
German
Published 17.11.2004
Edition7
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:An arrayed-waveguide grating type optical multi-demultiplexer (10) includes input waveguides (12), a first slab waveguide (13), a channel waveguide array (14), a second slab waveguide (15), and output waveguides (16). A pair of different refractive index regions (40), each having a refractive index different from that of the second slab waveguide (15), are formed on the second slab waveguide (15) near a boundary between the second slab waveguide (15) and channel waveguide array (14). The different refractive index regions (40) project in peninsular shapes from both side portions (15a, 15b) of the slab waveguide (15). Light traveling from each waveguide (14a) of the channel waveguide array (14) toward the output waveguides (16) passes through the different refractive index regions (40). An optical distribution with a flattened field-distribution peak is created at a boundary between the second slab waveguide (15) and output waveguides (16).
Bibliography:Application Number: EP20030022054