OPTICAL WAVEGUIDE MANUFACTURING METHOD

WIPO Patent Application WO/2023/074482

A1

An optical waveguide manufacturing method according to the present invention includes: a step for preparing a sheet-like workpiece that has a core layer containing a core-section forming region; and a step for cutting out an optical waveguide from, of the workpiece, inside the core-section forming region. The core layer is characterized by satisfying all of (a), (b), and (c) below.　(a) The core layer contains a polymer and a monomer and has a refractive index distribution based on the concentration difference of the monomer or the concentration difference of a structure originating from the monomer.　(b) The core-section forming region includes: a plurality of first core sections; second core sections provided on either side of each of the first core sections; and first side-surface clad sections provided between the first core sections and the second core sections. In addition, the core-section forming region is defined so that the plurality of second core sections are positioned at outer edges of the core-section forming region.　(c) The core-section forming region is a region in which the total area ratio accounted for by the first core sections and the second core sections in a 1-mm square area is equal to or greater than 50%.

KANEDA MIKIYA (JP)
IMAI HIROTAKE (JP)

PCT/JP2022/038856

May 04, 2023

October 19, 2022

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SUMITOMO BAKELITE CO (JP)

G02B6/132; G02B6/122

WO2016021505A1

2016-02-11

JP2015108819A	2015-06-11
JP2010232319A	2010-10-14
US11175452B1	2021-11-16
JP2010044279A	2010-02-25
JP2014002218A	2014-01-09
JP2017016017A	2017-01-19

MASUDA, Tatsuya et al. (JP)

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