JPS5597753A - Optical-fiber transmission control system - Google Patents

Optical-fiber transmission control system

Info

Publication number
JPS5597753A
JPS5597753A JP509379A JP509379A JPS5597753A JP S5597753 A JPS5597753 A JP S5597753A JP 509379 A JP509379 A JP 509379A JP 509379 A JP509379 A JP 509379A JP S5597753 A JPS5597753 A JP S5597753A
Authority
JP
Japan
Prior art keywords
light
unit
detecting element
branch unit
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
JP509379A
Other languages
Japanese (ja)
Other versions
JPS6121022B2 (en
Inventor
Kiyoshi Kubo
Tatsuo Fujita
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP509379A priority Critical patent/JPS5597753A/en
Publication of JPS5597753A publication Critical patent/JPS5597753A/en
Publication of JPS6121022B2 publication Critical patent/JPS6121022B2/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
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To make it possible to exercise a supervision over an optical fiber path all the time, by detecting reflected light from a reflector unit by inputting it to a light branch unit and by sending it to a photo detecting element. CONSTITUTION:Light branch units 4 and 6 are provided to both ends of optical fiber 5, and transmistted light is inputted from LED2 to light branch unit 4 to receive a photo signal, opposite in direction to the transmitted light branched by light branch unit 4, by photo detecting element 14. On the other hand, photo detecting element 8 receives the transmitted light from light btanch unit 6 and transmitted light outputted from light branch unit 6 is selectively reflected and inputted to light branch unit 6 through reflector unit 15 before being sent to photo detecting element 14. Consequently, reflected light returning by reflecting is detected to superivise an optical fiber path all the time.
JP509379A 1979-01-19 1979-01-19 Optical-fiber transmission control system Granted JPS5597753A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP509379A JPS5597753A (en) 1979-01-19 1979-01-19 Optical-fiber transmission control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP509379A JPS5597753A (en) 1979-01-19 1979-01-19 Optical-fiber transmission control system

Publications (2)

Publication Number Publication Date
JPS5597753A true JPS5597753A (en) 1980-07-25
JPS6121022B2 JPS6121022B2 (en) 1986-05-24

Family

ID=11601769

Family Applications (1)

Application Number Title Priority Date Filing Date
JP509379A Granted JPS5597753A (en) 1979-01-19 1979-01-19 Optical-fiber transmission control system

Country Status (1)

Country Link
JP (1) JPS5597753A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0117868A1 (en) * 1982-05-06 1984-09-12 Nippon Telegraph and Telephone Corporation Method and device for separating position of fault in light transmission line
FR2550400A1 (en) * 1983-08-04 1985-02-08 Thomson Csf Method and device for transmitting information by optical fibre.
EP0619657A1 (en) * 1993-04-08 1994-10-12 Koninklijke KPN N.V. Optical circuit for measuring the reflection sensitivity of an optical transmission system
US6704508B1 (en) 1999-06-16 2004-03-09 Nec Corporation Optical crossconnect, optical network device, and connection status supervisory method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0117868A1 (en) * 1982-05-06 1984-09-12 Nippon Telegraph and Telephone Corporation Method and device for separating position of fault in light transmission line
FR2550400A1 (en) * 1983-08-04 1985-02-08 Thomson Csf Method and device for transmitting information by optical fibre.
EP0619657A1 (en) * 1993-04-08 1994-10-12 Koninklijke KPN N.V. Optical circuit for measuring the reflection sensitivity of an optical transmission system
NL9300618A (en) * 1993-04-08 1994-11-01 Nederland Ptt Optical circuit for a measuring system for measuring the reflectivity of an optical transmission system.
US5455671A (en) * 1993-04-08 1995-10-03 Koninklijke Ptt Nederland N.V. Optical circuit for a measuring system for measuring the reflection sensitivity of an optical transmission system
US6704508B1 (en) 1999-06-16 2004-03-09 Nec Corporation Optical crossconnect, optical network device, and connection status supervisory method

Also Published As

Publication number Publication date
JPS6121022B2 (en) 1986-05-24

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