US4746577A
Expired / Lapsed
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Optical waveguides containing compositions having non-linear optical properties
Assignee: British Telecommunications PLC
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Filing: 1987-02-24
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Granted: 1988-05-24
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Expires: 2007-02-24
Abstract
Abstract Non linear optical compositions contain a vinylidene fluoride copolymer and an additive having molecular optoelectronic activity, e.g. methyl-N-(2,4-dinitrophenyl)-alaninate. Poled films derived from the composite display optoelectronic activity. There is a marked contrast with known techniques in which single crystals are utilized. The compositions are used to make laminates which display good waveguide properties.
Inventors
- 👤 Philippos Pantelis
- 👤 Graham J. Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:01
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3611; C; C08; C08K; C08K5/00; C08K5/16; C08K5/32; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/16; G02F1/01; G02F1/061; G02F1/065; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
83 words
A laminate having waveguide properties consisting of a light guiding layer enclosed between two confining layers in which the guiding layer is formed of a composition consisting essentially, in parts by weight based on the total composition, of: (A) 10% to 99.9% of a vinylidene fluoride polymer, (B) 0.1% to 50% of an additive that is an organic compound having non-linear optical properties, and (C) 0% to 60% of a polymeric auxiliary component material for enhancing the compatibility of components (A) and (B).
Claim 2
Dependent Claim
83 words
A laminate having waveguide properties consisting of a light guiding layer enclosed between two confining layers in which the guiding layer is formed of a composition consisting essentially, in parts by weight based on the total composition, of: (A) 10% to 99.9% of a vinylidene fluoride polymer, (B) 0.1% to 50% of an additive that is an organic compound having non-linear optical properties, and (C) 0% to 60% of a polymeric auxiliary component material for enhancing the compatibility of components (A) and (B).
Claim 3
Dependent Claim
17 words
A laminate according to claim 1 in which the guiding layer contains 0.5 to 30% of additive.
Claim 4
Dependent Claim
17 words
A laminate according to claim 2 in which the guiding layer contains 1 to 20% of additive.
Claim 5
Dependent Claim
24 words
A laminate according to claim 1 in which the additive in the guiding layer has β>10 -30 esu or γ>4×10 -35 esu or both.
Claim 6
Dependent Claim
11 words
A laminate according to claim 4 in which β>10 -30 esu.
Claim 7
Dependent Claim
63 words
A laminate according to claim 1 in which component (A) in the guiding layer is a homopolymer of CH 2 ═CF 2 or a copolymer of CH 2 ═CF 2 and up to 80 mole %, based on the copolymer, of a different comonomer having the formula C 2 F n H 4-n in which n is an integer from 1 to 4.
Claim 8
Dependent Claim
28 words
A laminate according to claim 6 in which the copolymer is of 75 mole % to 65 mole % vinylidene fluoride and 25% mole to 35% mole trifluoroethylene.
Claim 9
Dependent Claim
36 words
A laminate according to claim 1 in which the auxiliary component in the guiding layer is derived from monomeric molecules which contain one vinyl unsaturation and one carbonyl group and have a molecular weight below 150.
Claim 10
Dependent Claim
76 words
A laminate according to claim 8 in which each monomeric molecule has a formula selected from: (a) R"--CO--X--R' (b) R'--CO--X--R" or (c) Y--CO--Z--R" wherein R' is selected from --CH 3 or --C 2 H 5 R" is selected from --CH═CH 2 or --C(CH 3 )═CH 2 ; X is a bridge selected from a direct bond, --O--, --NH-- or --N(CH 3 )--; and Y and Z are linked together so as to form a pyrrolidone ring.
Claim 11
Dependent Claim
19 words
A laminate according to claim 8 in which the auxiliary component is poly(methylacrylate), poly(methylmethacrylate), poly(vinylacetate), poly(N-vinyl-2-pyrrolidone) or Poly(NN dimethylacrylamide).
Claim 12
Dependent Claim
23 words
A laminate according to claim 1 in which the additive in the guiding layer is 2-methyl-4-nitro-aniline 2'-dimethylamino-5'-nitroacetanilide 1-(5-nitro-2-pyridyl)pyrrolidin-2-ylmethanol 5'-nitro-2'-pyrrolidin-1-ylacetanilide 1-(4-nitrophenyl)pyrrolidin-2-ylmethanol methyl-N-(2,4-dinitrophenyl)-alaninate, or 1-phenylethyl(5-nitro-2-pyridyl)amine.
Claim 13
Dependent Claim
32 words
A laminate according to claim 1 in which the guiding layer contains: (A) 80 to 90% of a vinylidene fluoride polymer; and (B) 20 to 1% of an additive having non-linear properties.
Claim 14
Dependent Claim
50 words
A laminate according to claim 12 in which item (A) is a copolymer containing 75 mole % to 65 mole % of vinylidene fluoride and 25% mole to 35% mole of comonomer having the formula C 2 F n H(4-n) in which n is an integer from 1 to 4.
Claim 15
Dependent Claim
14 words
A laminate according to claim 13 in which item (B) is 2-methyl-4-nitroaniline or methyl-N-(2,4-dinitrophenyl)-alaninate.
Claim 16
Dependent Claim
26 words
A laminate according to claim 1 in which wherein each confining layer is formed of a vinylidene fluoride polymer containing less additive than the guiding layer.
Claim 17
Dependent Claim
16 words
A laminate according to claim 1 in which the confining layer contains zero concentration of additive.
Claim 18
Dependent Claim
19 words
A laminate according to claim 1 in which the outer surfaces of the guiding layers are provided with electrodes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-24 | 1991-11-23 | 1992-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-24 | 1995-11-23 | 1996-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-24 | 1999-11-23 | 2000-05-24 | $7700.00 | Window Closed / Lapsed |