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AssigneeNippon Telegraph and Telephone Corporation
InventorsMichiyuki Amano, Toshio Watanabe, Mitsuo Usui, Shungo Sugawara, Shoichi Hayashida, Saburo Imamura
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A polymeric optical material which is a mixture of a polysiloxane and at least one compound selected from the group consisting of polyisocyanate, silane, alkoxide and chelate, and an optical waveguide fabricated from the polymeric optical material having high thermal stability and low propagation loss over wide range. The polysiloxane may have, for example, a repeating unit of following formula (I): ##STR1## wherein each of R.sub.1 and R.sub.2 is independently an alkyl, deuterated alkyl or halogenated alkyl group, or a phenyl, deuterated phenyl or halogenated phenyl group. The optical waveguide includes a substrate, a clad layer provided on the substrate and a core layer surrounded by the clad layer. The clad layer is composed of a lower clad layer which is overlaid onto the substrate and an upper clad layer which surrounds the core layer.
A polymeric optical mixture, comprising:
A polymeric optical mixture, comprising:
A polymeric optical mixture, comprising:
A polymeric optical mixture, comprising:
A polymeric optical material which is prepared by cross-linking a polysiloxane comprising a repeating unit represented by formula (I):
A polymeric optical material which is prepared by cross-linking a polysiloxane containing a hydroxyl group therein with a cross-linking agent which is capable of cross-linking said polysiloxane, and which is selected from the group consisting of
A polymeric optical material which is prepared by cross-linking a polysiloxane comprising at least one unit selected from the group consisting of units A, B, C and D represented by formulae (II-1) to (II-4), respectively, and at least one unit selected from the group consisting of units E and F represented by formulae (II-5) and (II-6), respectively:
A polymeric optical material which is prepared by cross-linking a polysiloxane comprising a repeating unit represented by formula (III):
A polymeric optical waveguide having a core and a cladding surrounding the core, wherein at least one of said core and cladding comprises a polymeric optical material which is prepared by cross-linking a polysiloxane comprising a repeated unit represented by formula (I):
A polymeric optical waveguide having a core and a cladding surrounding the core, wherein, at least one of said core and cladding comprises a polymeric optical material which is prepared by cross-linking a polysiloxane containing a hydroxyl group therein with a cross-linking agent which is capable of cross-linking said polysiloxane, and which cross-linking agent is selected from the group consisting of
A polymeric optical waveguide having a core and a cladding surrounding the core, wherein at least one of said core and cladding comprises a polymeric optical material which is prepared by cross-linking a polysiloxane comprising at least one unit selected from the group consisting of units A, B, C and D represented by formulae (II-1) to (II-4), respectively, and at least one unit selected from the group consisting of units E and F represented by formulae (II-5) and (II-6), respectively:
A polymeric optical waveguide having a core and a cladding surrounding the core, wherein at least one of said core and cladding comprises a polymeric optical material which is prepared by cross-linking a polysiloxane comprising a repeating unit represented by formula (III):
Dependencies are inferred from the claim text.