OPTICAL WAVEGUIDE AND ARRAYED WAVEGUIDE GRATING

专利名称：OPTICAL WAVEGUIDE AND ARRAYED

WAVEGUIDE GRATING

发明人：MORITA, Keiichi,SHIMIZU,

Kazumi,KAWASHIMA, Koji

申请号：EP11851216.9申请日：20110926公开号：EP2657735A4公开日：20180124

摘要：This invention provides an optical waveguide which does not increase the circuitsize, does not make difficult the circuit design and manufacturing, and can reduceinsertion loss when light enters from a slab waveguide toward an arrayed waveguide orwhen the light enters from the arrayed waveguide toward the slab waveguide. Thisoptical waveguide is provided with a slab waveguide 1 in which a grating GP or GA isformed, an arrayed waveguide 2 connected to a position where a constructive

interference portion of a self-image of the grating GP or GA is formed, and a refractiveindex change region DV which is formed between the slab waveguide 1 and the arrayedwaveguide 2, in which an average value of a refractive index in a refractive indexdistribution in a direction substantially vertical to a light propagation direction isaveragely increased from the slab waveguide 1 toward the arrayed waveguide 2, and inwhich an average value of the refractive index in a refractive index distribution in adirection substantially parallel to the light propagation direction is increased at a centralaxis of the arrayed waveguide 2.

申请人：NTT Electronics Corporation

地址：1-32, Shin-urashimacho 1-chome Kanagawa-ku Yokohama-shi Kanagawa 221-0031 JP

国籍：JP

代理机构：Bobbert & Partner Patentanwälte PartmbB

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