JPS57180242A - Optical repeater - Google Patents

Optical repeater

Info

Publication number
JPS57180242A
JPS57180242A JP56064251A JP6425181A JPS57180242A JP S57180242 A JPS57180242 A JP S57180242A JP 56064251 A JP56064251 A JP 56064251A JP 6425181 A JP6425181 A JP 6425181A JP S57180242 A JPS57180242 A JP S57180242A
Authority
JP
Japan
Prior art keywords
optical
constitution
signal
switch
optical 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.)
Granted
Application number
JP56064251A
Other languages
Japanese (ja)
Other versions
JPS624020B2 (en
Inventor
Toru Enomoto
Yoshiki Higo
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56064251A priority Critical patent/JPS57180242A/en
Publication of JPS57180242A publication Critical patent/JPS57180242A/en
Publication of JPS624020B2 publication Critical patent/JPS624020B2/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

Abstract

PURPOSE:To perform automatical switching of an optical fiber in failure with simple constitution, by the constitution that an output optical signal is transmitted to two optical fibers and an optical switch at the reception input section is switched with a control signal of a gain controlling circuit. CONSTITUTION:Either one of optical signals from two optical fibers 2-1 and 2-2 is alternatively selected and inputted to a photodetector 1-2 by an optical switch 1-10 and an outputted optical signal is emitted to the two optical fibers 2-1 and 2-2 by an optical splitter, and the optical switch 1-10 is controlled with a control signal of a gain controlling circuit 1-4. Thus, if the photoreception amount from the optical fiber 2-1 is decreased to a prescribed value or less, the cable is replaced to the optical fiber 2-2 for reception.
JP56064251A 1981-04-30 1981-04-30 Optical repeater Granted JPS57180242A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56064251A JPS57180242A (en) 1981-04-30 1981-04-30 Optical repeater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56064251A JPS57180242A (en) 1981-04-30 1981-04-30 Optical repeater

Publications (2)

Publication Number Publication Date
JPS57180242A true JPS57180242A (en) 1982-11-06
JPS624020B2 JPS624020B2 (en) 1987-01-28

Family

ID=13252753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56064251A Granted JPS57180242A (en) 1981-04-30 1981-04-30 Optical repeater

Country Status (1)

Country Link
JP (1) JPS57180242A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59137659U (en) * 1983-03-02 1984-09-13 三菱電機株式会社 Fiber optic vehicle information transmission device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59137659U (en) * 1983-03-02 1984-09-13 三菱電機株式会社 Fiber optic vehicle information transmission device

Also Published As

Publication number Publication date
JPS624020B2 (en) 1987-01-28

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