US6047098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic optical waveguide and optical switch using same
Assignee: Hitachi Ltd
•
Filing: 1998-02-03
•
Granted: 2000-04-04
•
Expires: 2018-02-03
Abstract
Abstract A plastic optical waveguide with a low loss property, a low birefringence and a high temperature endurance constructed with a polyimide obtained from an acid dianhydride based component and a diamine based component, wherein at least one of a core layer and a cladding layer of the optical waveguide is made of an acid dianhydride based component including an alicyclic acid dianhydride or an aliphatic acid dianhydride, the plastic optical waveguide having an optical loss in a 1.3 mu m band of 0.5 dB/cm or less, and a refractive index of the core layer being larger than that of the cladding layer.
Inventors
- 👤 Masakazu Sagawa
- 👤 Takao Miwa
- 👤 Hisao Yokokura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:09
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/122; G02B6/1221; G02F; G02F1/00; G02F1/01; G02F1/061; G02F1/065
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
94 words
A plastic optical waveguide constructed with a polyimide obtained from an acid dianhydride based component and a diamine based component, wherein, in said plastic optical waveguide: at least one of a core layer and a cladding layer of the optical waveguide is made of an acid dianhydride based component which includes an alicyclic acid dianhydride or an aliphatic acid dianhydride, said plastic optical waveguide has an optical loss in a 1.3 μm band of 0.5 dB/cm or less, and a refractive index of the core layer is larger than that of the cladding layer.
Claim 2
Dependent Claim
94 words
A plastic optical waveguide constructed with a polyimide obtained from an acid dianhydride based component and a diamine based component, wherein, in said plastic optical waveguide: at least one of a core layer and a cladding layer of the optical waveguide is made of an acid dianhydride based component which includes an alicyclic acid dianhydride or an aliphatic acid dianhydride, said plastic optical waveguide has an optical loss in a 1.3 μm band of 0.5 dB/cm or less, and a refractive index of the core layer is larger than that of the cladding layer.
Claim 3
Dependent Claim
24 words
A plastic optical waveguide according to claim 1, wherein the acid dianhydride based component is an acid dianhydride having a linear saturated hydrocarbon skeleton.
Claim 4
Dependent Claim
24 words
A plastic optical waveguide according to claim 1, wherein the acid dianhydride based component is an acid dianhydride having an alicyclic saturated hydrocarbon skeleton.
Claim 5
Dependent Claim
24 words
A plastic optical waveguide according to claim 1, wherein the acid dianhydride based component is an acid dianhydride having a bridged alicyclic hydrocarbon structure.
Claim 6
Dependent Claim
111 words
A plastic optical waveguide constructed with a polyimide obtained from an acid dianhydride based component and a diamine based component, wherein, in said plastic optical wave guide: at least one of a core layer and a cladding layer constructing the optical waveguide are made of one or more materials from the group consisting of 1,2,3,4-butane tetracarboxylic acid dianhydride, 1,2,3,4-cyclobutane tetracarboxylic acid dianhydride, 1,2,3,4-cyclohexane tetracarboxylic acid dianhydride, 1,2,4,5-cyclohexane tetracarboxylic acid dianhydride, 3,3',4,4'-dicyclohexane tetracarboxylic acid dianhydride, 2,2',3,3'-dicyclohexane tetracarboxylic acid dianhydride, said optical waveguide having an optical loss in a 1.3 μm band of 0.5 dB/cm or less, and a refractive index of the core layer being larger than that of the cladding layer.
Claim 7
Dependent Claim
111 words
A plastic optical waveguide constructed with a polyimide obtained from an acid dianhydride based component and a diamine based component, wherein, in said plastic optical wave guide: at least one of a core layer and a cladding layer constructing the optical waveguide are made of one or more materials from the group consisting of 1,2,3,4-butane tetracarboxylic acid dianhydride, 1,2,3,4-cyclobutane tetracarboxylic acid dianhydride, 1,2,3,4-cyclohexane tetracarboxylic acid dianhydride, 1,2,4,5-cyclohexane tetracarboxylic acid dianhydride, 3,3',4,4'-dicyclohexane tetracarboxylic acid dianhydride, 2,2',3,3'-dicyclohexane tetracarboxylic acid dianhydride, said optical waveguide having an optical loss in a 1.3 μm band of 0.5 dB/cm or less, and a refractive index of the core layer being larger than that of the cladding layer.
Claim 8
Dependent Claim
106 words
An optical switch, comprising a core layer whose refractive index changes by an optical effect and a cladding layer in which the core is present, having two or more branch waveguides, wherein, in said optical switch: the core and cladding layer are constructed with polyimide obtained from an acid dianhydride based component, and a diamine based component and the acid dianhydride based component includes an alicyclic acid dianhydride and an aliphatic acid dianhydride, the optical waveguide having an optical loss in a 1.3 μm band of 0.5 dB/cm or less, and a refractive index of the core layer being larger than that of the cladding layer.
Claim 9
Dependent Claim
106 words
An optical switch, comprising a core layer whose refractive index changes by an optical effect and a cladding layer in which the core is present, having two or more branch waveguides, wherein, in said optical switch: the core and cladding layer are constructed with polyimide obtained from an acid dianhydride based component, and a diamine based component and the acid dianhydride based component includes an alicyclic acid dianhydride and an aliphatic acid dianhydride, the optical waveguide having an optical loss in a 1.3 μm band of 0.5 dB/cm or less, and a refractive index of the core layer being larger than that of the cladding layer.
Claim 10
Dependent Claim
23 words
An optical switch according to claim 6, wherein the acid dianhydride based component is an acid dianhydride having a linear saturated hydrocarbon skeleton.
Claim 11
Dependent Claim
23 words
An optical switch according to claim 6, wherein the acid dianhydride based component is an acid dianhydride having an alicyclic saturated hydrocarbon skeleton.
Claim 12
Dependent Claim
23 words
An optical switch according to claim 6, wherein the acid dianhydride based component is an acid dianhydride having a bridged alicyclic hydrocarbon structure.
Claim 13
Dependent Claim
139 words
An optical, comprising a core whose refractive index changes by an optical effect and a cladding layer in which the core is present, having two or more branch waveguides, wherein, in said optical switch: a plastic optical waveguide constructed with a polyimide obtained from an acid dianhydride based component and a diamine based component are used; in which at least one core and a cladding layer constructing the optical waveguide are made of one or more materials selected from the group consisting of 1,2,3,4-butane tetracarboxylic acid dianhydride, 1,2,3,4-cyclobutane tetracarboxylic acid dianhydride, 1,2,3,4-cyclohexane tetracarboxylic acid dianhydride, 1,2,4,5-cyclohexane tetracarboxylic acid dianhydride, 3,3',4,4'-dicyclohexane tetracarboxylic acid dianhydride, 2,2',3,3'-dicyclohexane tetracarboxylic acid dianhydride, said optical waveguide having an optical loss in a 1.3 μm band of 0.5 dB/cm or less, and a refractive index of the core being larger than that of the cladding layer.
Claim 14
Dependent Claim
139 words
An optical, comprising a core whose refractive index changes by an optical effect and a cladding layer in which the core is present, having two or more branch waveguides, wherein, in said optical switch: a plastic optical waveguide constructed with a polyimide obtained from an acid dianhydride based component and a diamine based component are used; in which at least one core and a cladding layer constructing the optical waveguide are made of one or more materials selected from the group consisting of 1,2,3,4-butane tetracarboxylic acid dianhydride, 1,2,3,4-cyclobutane tetracarboxylic acid dianhydride, 1,2,3,4-cyclohexane tetracarboxylic acid dianhydride, 1,2,4,5-cyclohexane tetracarboxylic acid dianhydride, 3,3',4,4'-dicyclohexane tetracarboxylic acid dianhydride, 2,2',3,3'-dicyclohexane tetracarboxylic acid dianhydride, said optical waveguide having an optical loss in a 1.3 μm band of 0.5 dB/cm or less, and a refractive index of the core being larger than that of the cladding layer.
References Cited (Backward Citations)
US4302233A
Cited
US4385165A
Cited
US4397999A
Cited
US5270431A
Cited
US5108201A
Cited
US5572619A
Cited
US5598501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-04-04 | 2003-10-04 | 2004-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-04-04 | 2007-10-04 | 2008-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-04-04 | 2011-10-04 | 2012-04-04 | $7700.00 | Window Closed / Lapsed |