JPS5448414A - Optical relay unit - Google Patents
Optical relay unitInfo
- Publication number
- JPS5448414A JPS5448414A JP11476577A JP11476577A JPS5448414A JP S5448414 A JPS5448414 A JP S5448414A JP 11476577 A JP11476577 A JP 11476577A JP 11476577 A JP11476577 A JP 11476577A JP S5448414 A JPS5448414 A JP S5448414A
- Authority
- JP
- Japan
- Prior art keywords
- photo
- converter
- amplifier
- output
- optical
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Optical Communication System (AREA)
Abstract
PURPOSE:To enable to perform optical delivery of frequency division at broad band frequency, by constituting the electro optical conversion system with the feed forward constitution. CONSTITUTION:The optical signal from the photo delivery line 1 is fed to the electro optical converter 6 via the photo electric converter 3, amplifier 4 and driver 5, and the photo signal output is fed to the photo modulator 11 via the photo circuit 10. Further, a part of the output optical signal of the converter 6 is inputted to the error amplifier 6 via the photo electric converter 7 and a part of the output of the driver 5 is via the delay circuit 8. The component of distortion caused at the converters 6 and 7 is detected and amplifier at the amplifier 9 and the detected output is fed to the photo modlulator 11. Accordingly, the distortion caused by the converter 6 is cancelled with the output of the amplifier 9 and the distortion caused with the converter 7 is made into predistortion, allowing to modulate the input signal of the modulator 11 and to deliver it to the optical delivery path 12.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11476577A JPS5448414A (en) | 1977-09-26 | 1977-09-26 | Optical relay unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11476577A JPS5448414A (en) | 1977-09-26 | 1977-09-26 | Optical relay unit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5448414A true JPS5448414A (en) | 1979-04-17 |
JPS5636622B2 JPS5636622B2 (en) | 1981-08-25 |
Family
ID=14646114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11476577A Granted JPS5448414A (en) | 1977-09-26 | 1977-09-26 | Optical relay unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5448414A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0416424A2 (en) * | 1989-09-06 | 1991-03-13 | General Instrument Corporation | Apparatus and method for reducing distortion in an analog optical transmission system |
JPWO2006051849A1 (en) * | 2004-11-11 | 2008-05-29 | 日本電信電話株式会社 | Optical transmission apparatus, optical transmission system, optical transmission method, and optical transmission method |
US9482468B2 (en) * | 2005-09-14 | 2016-11-01 | Mattson Technology, Inc. | Repeatable heat-treating methods and apparatus |
-
1977
- 1977-09-26 JP JP11476577A patent/JPS5448414A/en active Granted
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0416424A2 (en) * | 1989-09-06 | 1991-03-13 | General Instrument Corporation | Apparatus and method for reducing distortion in an analog optical transmission system |
EP0416424A3 (en) * | 1989-09-06 | 1991-12-04 | General Instrument Corporation | Apparatus and method for reducing distortion in an analog optical transmission system |
JPWO2006051849A1 (en) * | 2004-11-11 | 2008-05-29 | 日本電信電話株式会社 | Optical transmission apparatus, optical transmission system, optical transmission method, and optical transmission method |
US7865085B2 (en) | 2004-11-11 | 2011-01-04 | Nippon Telegraph And Telephone Corporation | Optical transmitting device, optical transmission system, optical transmitting method and optical transmission method |
US9482468B2 (en) * | 2005-09-14 | 2016-11-01 | Mattson Technology, Inc. | Repeatable heat-treating methods and apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPS5636622B2 (en) | 1981-08-25 |
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