JPS5448414A - Optical relay unit - Google Patents

Optical relay unit

Info

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
Application number
JP11476577A
Other languages
Japanese (ja)
Other versions
JPS5636622B2 (en
Inventor
Nobuyuki Tokura
Ichiro Yamashita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP11476577A priority Critical patent/JPS5448414A/en
Publication of JPS5448414A publication Critical patent/JPS5448414A/en
Publication of JPS5636622B2 publication Critical patent/JPS5636622B2/ja
Granted legal-status Critical Current

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)
  • Optical Communication System (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (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.
JP11476577A 1977-09-26 1977-09-26 Optical relay unit Granted JPS5448414A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (5)

* Cited by examiner, † Cited by third party
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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