JPS6482004A - Optical star coupler - Google Patents
Optical star couplerInfo
- Publication number
- JPS6482004A JPS6482004A JP24179987A JP24179987A JPS6482004A JP S6482004 A JPS6482004 A JP S6482004A JP 24179987 A JP24179987 A JP 24179987A JP 24179987 A JP24179987 A JP 24179987A JP S6482004 A JPS6482004 A JP S6482004A
- Authority
- JP
- Japan
- Prior art keywords
- coupler
- thickness
- plate type
- transmission loss
- reduce
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
- G02B6/2808—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using a mixing element which evenly distributes an input signal over a number of outputs
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Integrated Circuits (AREA)
Abstract
PURPOSE:To reduce the optical transmission loss and distribution deviation of the optical star coupler and to reduce the size of the coupler by using a mixing element formed by curving a plate type transparent polymer in a specific U shape. CONSTITUTION:The mixing element 3 is formed of the L-shaped plate type transparent polymer (e.g. acryl resin) molding which has thickness (t) and width W and curved in the U shape whose radius (r) of curvature is >=5 times as large as the thickness (t). The titled coupler is formed having input and output optical fiber arrays 1 and 2 on both end surfaces of the element 3 opposite each other. When said r/t is >=5 times, the optical transmission loss of the element 3 is reduced below a specific value. If, however, the r/t is made too large, the coupler increases in size, which is not preferable. Further, when the L/W is made larger than a specific value, the characteristics of the mean light distribution deviation between the arrays 1 and 2 are improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24179987A JPS6482004A (en) | 1987-09-25 | 1987-09-25 | Optical star coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24179987A JPS6482004A (en) | 1987-09-25 | 1987-09-25 | Optical star coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6482004A true JPS6482004A (en) | 1989-03-28 |
Family
ID=17079683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24179987A Pending JPS6482004A (en) | 1987-09-25 | 1987-09-25 | Optical star coupler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6482004A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0479100A2 (en) * | 1990-10-01 | 1992-04-08 | Delphi Automotive Systems Deutschland GmbH | Optical star coupler |
| JP2006034949A (en) * | 2004-06-25 | 2006-02-09 | Toshiba Corp | X-ray diagnostic apparatus and x-ray imaging method |
-
1987
- 1987-09-25 JP JP24179987A patent/JPS6482004A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0479100A2 (en) * | 1990-10-01 | 1992-04-08 | Delphi Automotive Systems Deutschland GmbH | Optical star coupler |
| JP2006034949A (en) * | 2004-06-25 | 2006-02-09 | Toshiba Corp | X-ray diagnostic apparatus and x-ray imaging method |
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