EP0420592A2
Expired / Lapsed
EP
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Planar plastics optical waveguide
Assignee: NTT Inc
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Filing: 1990-09-25
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Granted: —
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Expires: 2010-09-25
Abstract
Abstract A plate plastics optical waveguide comprises a core portion (3) composed of a polymer containing a deuteriumation or a halogen atom, and a clad portion (2, 7) which surrounds the core portion and composed of a polymer having a refractive index lower than that of the core portion. The plastics optical waveguide which has a core portion comprising a deuterated or halogenated polyacrylate or polysiloxane shows an optical loss of 0.1 dB/cm or less for a light at a wavelength of 1.3 µm.
Inventors
- 👤 Saburo Imamura
- 👤 Tatsuo Izawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 12:21
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B1/00; G02B1/04; G02B1/045; G02B1/046; G02B6/12; G02B6/122; G02B6/1221; G02B6/13; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
49 words
A plate plastics optical waveguide characterized by comprising: a core portion composed of a polymer containing a deuterium atom or a halogen atom, and a clad portion surrounding the core portion and composed of a polymer having a refractive index lower than a refractive index of said core portion.
Claim 2
Dependent Claim
49 words
A plate plastics optical waveguide characterized by comprising: a core portion composed of a polymer containing a deuterium atom or a halogen atom, and a clad portion surrounding the core portion and composed of a polymer having a refractive index lower than a refractive index of said core portion.
Claim 3
Dependent Claim
102 words
A plate plastics optical waveguide as claimed in claim 1, characterized in that said core portion is composed of a deuterated or halogenated polyacrylate having a repeating unit represented by the following formula (I): wherein each of X, and X 2 is a deuterium atom or a halogen atom; R, is selected from the group consisting of a deuterium atom, a CD 3 group and a halogen atom; and R 2 is a halogenated or deuterated alkyl group of formula: C n Y 2n-1 (where Y is a halogen atom or a deuterium atom; n is one integer of 1 to 5).
Claim 4
Dependent Claim
112 words
A plate plastics optical waveguide as claimed in claim 1, characterized in that said core portion is composed of a copolymer of deuterated or halogenated acrylates, said copolymer has at least two different repeating units represented by the following formula (I), respectively: wherein each of X 1 and X 2 is a deuterium atom or a halogen atom; R, is selected from the group consisting of a deuterium atom, a CD 3 group and a halogen atom; and R 2 is a halogenated or deuterated alkyl group of formula: C n Y 2n-1 (where Y is a halogen atom or a deuterium atom; n is one integer of 1 to 5) .
Claim 5
Dependent Claim
77 words
A plate plastics optical waveguide as claimed in claim 1, characterized in that said core portion is composed of a deuterated or halogenated polysiloxane having a repeating unit represented by the following formula (II) or (III): wherein each of R 3 and R 4 is a group of formula C n Y 2n+1 (where Y is a halogen atom or a deuterium atom; n is one integer of 1 to 5) or C 6 Y 5 .
Claim 6
Dependent Claim
97 words
A plate plastics optical waveguide as claimed in claim 1, characterized in that said core portion is composed of a copolymer of deuterated or halogenated siloxanes, said copolymer has at least two different repeating units represented by the following formula (II), respectively, or at least two different repeating units represented by the following formula (III), respectively: wherein each of R 3 and R 4 is a group of formula C n Y 2n+1 (where Y is a halogen atom or a deuterium atom; n is one integer of 1 to 5) or C 6 Y 5 .
Claim 7
Dependent Claim
69 words
A plate plastics optical waveguide as claimed in claim 1, characterized in that said core portion is composed of a copolymer having repeating units represented by the following formulae (II) and (III): wherein each of R 3 and R 4 is a group of formula C n Y 2n+1 (where Y is a halogen atom or a deuterium atom; n is one integer of 1 to 5) or CsYs.
Claim 8
Dependent Claim
27 words
A plate optical waveguide as claimed in claim 1, characterized in that said clad portion is composed a polymer having a deuterium atom or a halogen atom.
Claim 9
Dependent Claim
102 words
A plate optical waveguide as claimed in claim 7, characterized in that said clad portion is composed a deuterated or halogenated polyacrylate having a repeating unit represented by the following formula (I): wherein each of X 1 and X 2 is a deuterium atom or a halogen atom; R, is selected from the group consisting of a deuterium atom, a CD 3 group and a halogen atom; and R 2 is a halogenated or deuterated alkyl group of formula: C n Y 2n-1 (where Y is a halogen atom or a deuterium atom; n is one integer of 1 to 5) .
Claim 10
Dependent Claim
112 words
A plate plastics optical waveguide as claimed in claim 7, characterized in that said clad portion is composed of copolymer of a deuterated or halogenated acrylates, said copolymer has at least two different repeating units represented by the following formula (I), respectively: wherein each of X, and X 2 is a deuterium atom or a halogen atom; R 1 is selected from the group consisting of a deuterium atom, a CD 3 group and a halogen atom; and R 2 is a halogenated or deuterated alkyl group of formula: C n Y 2n-1 (where Y is a halogen atom or a deuterium atom; n is one integer of 1 to 5) .
Claim 11
Dependent Claim
78 words
A plate plastics optical waveguide as claimed in claim 7, characterized in that said clad portion is composed of a deuterated or halogenated polysiloxane having a repeating unit represented by the following formula (II) or (III): wherein each of R 3 and R 4 is a group of formula C n Y 2n+1 (where Y is a halogen atom or a heavy hydrogen atom; n is one integer of 1 to 5) or C 6 Y 5 .
Claim 12
Dependent Claim
97 words
A plate plastics optical waveguide as claimed in claim 7, characterized in that said clad portion is composed of a copolymer of deuterated or halogenated siloxanes, said copolymer has at least two different repeating units represented by the following formula (II), respectively, or at least two different repeating units represented by the following formula (III), respectively: wherein each of R 3 and R 4 is a group of formula C n Y 2n+1 (where Y is a halogen atom or a deuterium atom; n is one integer of 1 to 5) or C 6 Y 5 .
Claim 13
Dependent Claim
73 words
A plate plastics optical waveguide as claimed in claim 7, characterized in that said clad portion is composed of a copolymer having repeating units represented by the following formulae (II) and (III): wherein each of R 3 and R 4 is a group of formula C n Y 2n+1 (where Y is a halogen atom or a deuterium atom; n is one integer of 1 to 5) or C 6 Y 5 .
Claim 14
Dependent Claim
80 words
A plate plastics optical waveguide characterized by comprising: a substrate, a lower clad portion made of a first polymer and provided on said substrate; a core portion made of a homopolymer or copolymer of dueterated or halogenated acrylates or deuterated or halogenated siloxanes provided on said lower clad portion; and an upper clad portion made of said first polymer, said upper clad portion being provided on said core portion and surrounding said core portion together with said lower clad portion.
Claim 15
Dependent Claim
80 words
A plate plastics optical waveguide characterized by comprising: a substrate, a lower clad portion made of a first polymer and provided on said substrate; a core portion made of a homopolymer or copolymer of dueterated or halogenated acrylates or deuterated or halogenated siloxanes provided on said lower clad portion; and an upper clad portion made of said first polymer, said upper clad portion being provided on said core portion and surrounding said core portion together with said lower clad portion.
Claim 16
Dependent Claim
39 words
A plate plastics optical waveguide as claimed in claim 13, characterized in that said first polymer constituting said lower and upper clad portions is composed of homopolymer or copolymer of deuterated or halogenated acrylates or deuterated or halogenated siloxanes.
Claim 17
Dependent Claim
21 words
A polymeric optical waveguide in which carbon to hydrogen vibration causing higher harmonic infra-red absorption has been reduced by hydrogen replacement.
Claim 18
Dependent Claim
21 words
A polymeric optical waveguide in which carbon to hydrogen vibration causing higher harmonic infra-red absorption has been reduced by hydrogen replacement.
Claim 19
Dependent Claim
19 words
A material suitable for use as an optical waveguide or as a core therefor containing deuterium and/or halogen atoms.
Claim 20
Dependent Claim
19 words
A material suitable for use as an optical waveguide or as a core therefor containing deuterium and/or halogen atoms.
References Cited (Backward Citations)
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