OPTICAL TRANSMISSION&sol RECEPTION MODULE OF OPTICAL WAVEGUIDE TYPE, AND SUBSTRATE FOR MAKING THE SAME

WIPO Patent Application WO/2003/058305

A1

An optical transmission&sol reception module of optical waveguide type comprising a substrate and optical elements formed thereon, wherein optical crosstalk reducing means is provided to the substrate. An optical transmission&sol reception module of optical waveguide type comprising a lower clad layer, a core layer, an upper clad layer for embedding the core layer, a light receiving element and a light emitting element, wherein the width of the clad layer adjacent to the core layer at least in the vicinity of the light emitting element is three to five times the width of the core layer. A substrate for making an optical transmission&sol reception module of optical waveguide type, wherein optical crosstalk reducing means is provided. The optical transmission&sol reception module of optical waveguide type can significantly reduce optical crosstalk and significantly suppress degradation of reception sensitivity. Since the optical crosstalk reducing means is provided to the substrate, the manufacturing is easy as compared with the conventional way in which optical crosstalk reducing means is provided to the optical elements on the substrate.

TAKAHASHI TOORU (JP)
MIYADERA NOBUO (JP)

PCT/JP2002/013666

July 17, 2003

December 26, 2002

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HITACHI CHEMICAL CO LTD (JP)
TAKAHASHI TOORU (JP)
MIYADERA NOBUO (JP)

G02B6/12; G02B6/125; G02B6/42; (IPC1-7): G02B6/12

JPH11248954A	1999-09-17
JPH10282351A	1998-10-23
JPH07301537A	1995-11-14

Nakamura, Minoru (3-1 Marunouchi 3-Chom, Chiyoda-Ku Tokyo, JP)

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