US6454467B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical transmission and reception system, and optical transmission and reception module and optical cable for the system
Assignee: Sharp Corp
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Filing: 2000-10-19
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Granted: 2002-09-24
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Expires: 2020-10-19
Abstract
Abstract In an optical transmission and reception module, a partitioning member separating a light emitting device and a light receiving device from each other includes a partitioning plate having a concave surface, an engaging portion to which the partitioning plate is fixed, a holding portion holding the engaging portion movably, and a leaf spring for pressing the engaging portion against an optical plug. An end surface of an optical fiber is convex and projects from a front end of the optical plug. When the end surface of the optical plug is in contact with an engaging surface of the engaging portion, a gap is generated between the end surface of the optical fiber and a surface opposed thereto.
Inventors
- 👤 Takehisa Ishihara
- 👤 Hajime Kashida
- 👤 Kentaro Terashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:10
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/34; G02B6/42; G02B6/4201; G02B6/4246; G02B6/28; G02B6/2804
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
77 words
An optical transmission and reception module, comprising a light emitting element emitting transmission light and a light receiving element receiving reception light, for transmitting and receiving the light by using an identical one-core optical fiber, further comprising: a light-tight partitioning plate touching an end surface of the optical fiber when the optical fiber is in place in the module, and separating an optical path of the transmission light and that of the reception light from each other.
Claim 2
Dependent Claim
77 words
An optical transmission and reception module, comprising a light emitting element emitting transmission light and a light receiving element receiving reception light, for transmitting and receiving the light by using an identical one-core optical fiber, further comprising: a light-tight partitioning plate touching an end surface of the optical fiber when the optical fiber is in place in the module, and separating an optical path of the transmission light and that of the reception light from each other.
Claim 3
Dependent Claim
60 words
An optical transmission and reception module according to claim 1 , wherein the partitioning plate is located at a position where the partitioning plate is pressed by the end surface of the optical fiber when the optical fiber is fitted into the module, and the partitioning plate is elastically deformable when pressed by the end surface of the optical fiber.
Claim 4
Dependent Claim
49 words
An optical transmission and reception module according to claim 2 , wherein the partitioning plate has a partitioning portion touching the end surface of the optical fiber and an elastically deformable portion that elastically deforms when the partitioning plate is pressed by the end surface of the optical fiber.
Claim 5
Dependent Claim
64 words
An optical transmission and reception module according to claim 1 , wherein the partitioning plate is extended toward the light emitting and receiving elements such that the partitioning plate is interposed between optical elements provided between the end surface of the optical fiber and each of the light emitting and receiving elements, and/or interposed between the light receiving element and the light emitting element.
Claim 6
Dependent Claim
36 words
An optical transmission and reception module according to claim 4 , wherein the partitioning plate is formed of an electrically conductive material and an electrical potential of the partitioning plate is set to a ground potential.
Claim 7
Dependent Claim
35 words
An optical transmission and reception module according to claim 1 , wherein a light absorbing layer is formed on a contact surface of the partitioning plate that touches the end surface of the optical fiber.
Claim 8
Dependent Claim
47 words
An optical transmission and reception module according to claim 1 , wherein optical elements are disposed between the end surface of the optical fiber and each of the light emitting and receiving elements, and an anti-reflection film is formed on an optical-fiber-side surface of each optical element.
Claim 9
Dependent Claim
62 words
An optical transmission and reception module according to claim 1 , wherein optical elements are disposed between the end surface of the optical fiber and each of the light emitting and receiving elements, each optical element comprises an optical deflection element, and the light receiving element and the light emitting element are inclined relative to optical axes of the optical deflection elements.
Claim 10
Dependent Claim
36 words
An optical transmission and reception system comprising: an optical transmission and reception module according to claim 13 ; and an optical cable having a one-core optical fiber inside, wherein the optical fiber has inclined end surfaces.
Claim 11
Dependent Claim
103 words
An optical transmission and reception module, comprising a light emitting element emitting transmission light and a light receiving element receiving reception light, for transmitting and receiving the light by using an identical one-core optical fiber, further comprising: a light-tight partitioning member separating an optical path of the transmission light and that of the reception light from each other, wherein the partitioning member has an opposed surface to be opposed to an end surface of the optical fiber, with a gap left between the partitioning member and an end surface of the optical fiber, when the optical fiber is in place in the module.
Claim 12
Dependent Claim
103 words
An optical transmission and reception module, comprising a light emitting element emitting transmission light and a light receiving element receiving reception light, for transmitting and receiving the light by using an identical one-core optical fiber, further comprising: a light-tight partitioning member separating an optical path of the transmission light and that of the reception light from each other, wherein the partitioning member has an opposed surface to be opposed to an end surface of the optical fiber, with a gap left between the partitioning member and an end surface of the optical fiber, when the optical fiber is in place in the module.
Claim 13
Dependent Claim
50 words
An optical transmission and reception module according to claim 10 , wherein the partitioning member has a positioning means for, when the optical fiber is placed in position in the module, positioning the opposed surface relative to the end surface of the optical fiber such that the gap is constant.
Claim 14
Dependent Claim
46 words
An optical transmission and reception module according to claim 11 , wherein the positioning means comprises an engaging surface to touch an end surface of an optical plug holding the optical fiber therein, and the engaging surface has a fixed positional relationship with the opposed surface.
Claim 15
Dependent Claim
93 words
An optical transmission and reception module according to claim 12 , wherein the partitioning member comprises: a partitioning plate disposed between the light emitting element and the light receiving element and having the opposed surface; an engaging portion to which the partitioning plate is fixed and which has the engaging surface; and a holding portion holding the engaging portion such that the engaging portion is movable in a direction of an optical axis of the optical fiber, the holding portion having a spring means for urging the engaging portion to the optical fiber.
Claim 16
Dependent Claim
34 words
An optical transmission and reception module according to claim 13 , wherein the engaging portion has a generally truncated-cone-shaped hole for receiving a front end of an optical plug having the optical fiber therein.
Claim 17
Dependent Claim
28 words
An optical transmission and reception module according to claim 12 , wherein the partitioning member further has a spring means urging the engaging surface to the optical fiber.
Claim 18
Dependent Claim
27 words
An optical transmission and reception module according to claim 12 , wherein a material having a low coefficient of sliding friction is used for the engaging surface.
Claim 19
Dependent Claim
51 words
An optical transmission and reception module according to claim 11 , wherein the positioning means comprises an engaging surface to touch a portion of the end surface of the optical fiber through which portion light does not pass, and the engaging surface has a fixed positional relationship with the opposed surface.
Claim 20
Dependent Claim
93 words
An optical transmission and reception module according to claim 17 , wherein the partitioning member comprises: a partitioning plate disposed between the light emitting element and the light receiving element and having the opposed surface; an engaging portion to which the partitioning plate is fixed and which has the engaging surface; and a holding portion holding the engaging portion such that the engaging portion is movable in a direction of an optical axis of the optical fiber, the holding portion having a spring means for urging the engaging portion to the optical fiber.
Claim 21
Dependent Claim
34 words
An optical transmission and reception module according to claim 18 , wherein the engaging portion has a generally truncated-cone-shaped hole for receiving a front end of an optical plug having the optical fiber therein.
Claim 22
Dependent Claim
28 words
An optical transmission and reception module according to claim 17 , wherein the partitioning member further has a spring means urging the engaging surface to the optical fiber.
Claim 23
Dependent Claim
27 words
An optical transmission and reception module according to claim 17 , wherein a material having a low coefficient of sliding friction is used for the engaging surface.
Claim 24
Dependent Claim
52 words
An optical transmission and reception system comprising: an optical transmission and reception module according to claim 10 ; and an optical cable having a one-core optical fiber passed therethrough, wherein each of end surfaces of the optical fiber is a curved surface rotationally symmetrical about an optical axis of the optical fiber.
Claim 25
Dependent Claim
54 words
An optical transmission and reception system according to claim 22 , wherein each end surface of the optical fiber projects from a plug provided at opposite ends of the optical fiber, and a radially outward portion of the end surface of the optical fiber covers a part of an end surface of the plug.
Claim 26
Dependent Claim
41 words
An optical transmission and reception system according to claim 22 , wherein the opposed surface of the partitioning member in the optical transmission and reception module has a shape complementary to a shape of an end surface of the optical fiber.
Claim 27
Dependent Claim
22 words
An optical transmission and reception module according to claim 10 , wherein the gap G has a dimension of 0 mm<G<0.3 mm.
References Cited (Backward Citations)
US4549314A
Cited
JPS6445805A
Cited
JPH07248429A
Cited
JPH1039181A
Cited
US6188495B1
Cited
US6142680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-09-23 | 2006-03-25 | 2006-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-09-23 | 2010-03-25 | 2010-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-09-23 | 2014-03-25 | 2014-09-24 | $7700.00 | Window Closed / Lapsed |