JPS57190919A - Optical multiplexer and demultiplexer - Google Patents
Optical multiplexer and demultiplexerInfo
- Publication number
- JPS57190919A JPS57190919A JP7484181A JP7484181A JPS57190919A JP S57190919 A JPS57190919 A JP S57190919A JP 7484181 A JP7484181 A JP 7484181A JP 7484181 A JP7484181 A JP 7484181A JP S57190919 A JPS57190919 A JP S57190919A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- port
- light
- reflector
- fiber
- 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
- G02B6/2817—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 reflective elements to split or combine optical signals
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Filters (AREA)
Abstract
PURPOSE:To reduce the increment of loss and to suppress crosstalk, by making the use of wavelength shift characteristics and an optical reflecting matter like a reflector, etc. to the incident angle of an interference film filter. CONSTITUTION:The light lambda2 transmitted from a transmitting port 1b is reflected by an interference film filter 11 and then transmitted to a fiber from a transmitting port 1c. A part of the light lambda2 is reflected at a part connected to the fiber and traces the original optical path. A part of this light reaches a receiving port 1a via the filter 11, a reflector 13 set obliquely and the filter 11. The degree of crosstalk is extremely small under the opening conditions of the port 1c owing to the suppression in twice by the filter 11. On the other hand, the light lambda1 made incident from the port 1c via the fiber transmits twice through the filter 11 via the reflector 13 and then received at the port 1a. The spectrum limitation loss caused by the filter can be reduced since the double filter transmission characteristics are provided to the wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7484181A JPS57190919A (en) | 1981-05-20 | 1981-05-20 | Optical multiplexer and demultiplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7484181A JPS57190919A (en) | 1981-05-20 | 1981-05-20 | Optical multiplexer and demultiplexer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57190919A true JPS57190919A (en) | 1982-11-24 |
Family
ID=13558954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7484181A Pending JPS57190919A (en) | 1981-05-20 | 1981-05-20 | Optical multiplexer and demultiplexer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57190919A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58149019A (en) * | 1982-03-01 | 1983-09-05 | Nippon Telegr & Teleph Corp <Ntt> | Optical multiplexer and demultiplexer |
| JPS59185309A (en) * | 1983-04-05 | 1984-10-20 | Matsushita Electric Ind Co Ltd | Optical multiplexer/demultiplexer |
| JPS60184216A (en) * | 1984-03-02 | 1985-09-19 | Oki Electric Ind Co Ltd | Hybrid optical multiplexer/demultiplexer |
| JPS61285413A (en) * | 1985-06-12 | 1986-12-16 | Fujitsu Ltd | Optical multiplexer and demultiplexer |
-
1981
- 1981-05-20 JP JP7484181A patent/JPS57190919A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58149019A (en) * | 1982-03-01 | 1983-09-05 | Nippon Telegr & Teleph Corp <Ntt> | Optical multiplexer and demultiplexer |
| JPS59185309A (en) * | 1983-04-05 | 1984-10-20 | Matsushita Electric Ind Co Ltd | Optical multiplexer/demultiplexer |
| JPS60184216A (en) * | 1984-03-02 | 1985-09-19 | Oki Electric Ind Co Ltd | Hybrid optical multiplexer/demultiplexer |
| JPS61285413A (en) * | 1985-06-12 | 1986-12-16 | Fujitsu Ltd | Optical multiplexer and demultiplexer |
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