JPS55117114A - Optical coupling device - Google Patents
Optical coupling deviceInfo
- Publication number
- JPS55117114A JPS55117114A JP2477579A JP2477579A JPS55117114A JP S55117114 A JPS55117114 A JP S55117114A JP 2477579 A JP2477579 A JP 2477579A JP 2477579 A JP2477579 A JP 2477579A JP S55117114 A JPS55117114 A JP S55117114A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- face
- reflected light
- semiconductor laser
- light
- 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
Abstract
PURPOSE: To remove the reflected light returning from the light receiving surface of optical fibers and the other end face by providing a light attenuating means to one or both of between a semiconductor laser and lens-form converging medium and between the lens-form converging medium and optical fiber.
CONSTITUTION: The reflected light returning from the light receiving end of an optical fiber 4 and the other end face is attenuated by light attenuating films 6 and 5 as shown by the broken lines and therefore the reflected light returning to a semiconductor laser 1 is less. In addition, the exit light of the semiconductor laser 1 is entered to the optical fiber 4 in a plug 3 through an optical filter 8 and lens-form converging medium 2, but the reflected light returning from the light receiving end of this optical fiber 4 and its other end face is attenuated by the optical fiber 8 as shown by the broken lines and therefore the amount of return to the optical fiber 1 is less. By such constitution, the reflected light returning from the light receiving face and other end face of the optical fiber is removed and the noise of the semiconductor laser may be improved.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2477579A JPS55117114A (en) | 1979-03-02 | 1979-03-02 | Optical coupling device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2477579A JPS55117114A (en) | 1979-03-02 | 1979-03-02 | Optical coupling device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55117114A true JPS55117114A (en) | 1980-09-09 |
Family
ID=12147540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2477579A Pending JPS55117114A (en) | 1979-03-02 | 1979-03-02 | Optical coupling device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55117114A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4880289A (en) * | 1983-12-16 | 1989-11-14 | Hitachi, Ltd. | Two-way optical transmission system |
US5040862A (en) * | 1990-05-07 | 1991-08-20 | Corning Incorporated | Method of trimming optical power |
-
1979
- 1979-03-02 JP JP2477579A patent/JPS55117114A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4880289A (en) * | 1983-12-16 | 1989-11-14 | Hitachi, Ltd. | Two-way optical transmission system |
US5040862A (en) * | 1990-05-07 | 1991-08-20 | Corning Incorporated | Method of trimming optical power |
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