JPS55113005A - Photo coupling device - Google Patents
Photo coupling deviceInfo
- Publication number
- JPS55113005A JPS55113005A JP2025279A JP2025279A JPS55113005A JP S55113005 A JPS55113005 A JP S55113005A JP 2025279 A JP2025279 A JP 2025279A JP 2025279 A JP2025279 A JP 2025279A JP S55113005 A JPS55113005 A JP S55113005A
- Authority
- JP
- Japan
- Prior art keywords
- semiconductor laser
- optical fiber
- face
- light
- medium
- 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
Landscapes
- Optical Couplings Of Light Guides (AREA)
Abstract
PURPOSE: To obtain the photo coupling device of less laser noise in which the reflected light of the optical fiber end does not return to semiconductor laser by parting the photo detecting end face of the optical fiber forward and backward by the specified distance from the imaging position of semiconductor laser light.
CONSTITUTION: Exit light of a semiconductor laser 1 passes through a lens-form medium 2 and enters the optical fiber 4 in a plug 3. Thence, the end face B of the optical fiber 4 is so installed as to come to the position away backward by the distance at which the reflected luminous flux returning to the semiconductor laser 1 becomes 10% or less of the exit luminous flux with respect to the imaging position of the laser light by the medium 2. Then, the amount that the reflected light from the end face B of the optical fiber 4 and the end face A of the medium 2 is returned to the semiconductor laser 1 is considerably reduced. Thereby, the semiconductor laser noise may be considerably reduced, the SN ratio of optical transmission improved and the light signal output maintained stably.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2025279A JPS55113005A (en) | 1979-02-23 | 1979-02-23 | Photo coupling device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2025279A JPS55113005A (en) | 1979-02-23 | 1979-02-23 | Photo coupling device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55113005A true JPS55113005A (en) | 1980-09-01 |
Family
ID=12021997
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2025279A Pending JPS55113005A (en) | 1979-02-23 | 1979-02-23 | Photo coupling device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55113005A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5862313U (en) * | 1981-10-20 | 1983-04-26 | 株式会社東芝 | Laser beam transmission equipment |
JPS59200540A (en) * | 1983-04-27 | 1984-11-13 | Hitachi Cable Ltd | Wide-band optical transmission system |
US4836633A (en) * | 1985-03-22 | 1989-06-06 | Plessey Overseas Limited | Optical connecting arrangements |
-
1979
- 1979-02-23 JP JP2025279A patent/JPS55113005A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5862313U (en) * | 1981-10-20 | 1983-04-26 | 株式会社東芝 | Laser beam transmission equipment |
JPS6032652Y2 (en) * | 1981-10-20 | 1985-09-30 | 株式会社東芝 | Laser beam transmission equipment |
JPS59200540A (en) * | 1983-04-27 | 1984-11-13 | Hitachi Cable Ltd | Wide-band optical transmission system |
US4836633A (en) * | 1985-03-22 | 1989-06-06 | Plessey Overseas Limited | Optical connecting arrangements |
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