NO942355D0 - - Google Patents

Info

Publication number
NO942355D0
NO942355D0 NO942355A NO942355A NO942355D0 NO 942355 D0 NO942355 D0 NO 942355D0 NO 942355 A NO942355 A NO 942355A NO 942355 A NO942355 A NO 942355A NO 942355 D0 NO942355 D0 NO 942355D0
Authority
NO
Norway
Prior art keywords
laser
als
monitoring circuits
laser transmitter
reconnection
Prior art date
Application number
NO942355A
Other languages
Norwegian (no)
Other versions
NO942355L (en
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of NO942355D0 publication Critical patent/NO942355D0/no
Publication of NO942355L publication Critical patent/NO942355L/en

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
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0799—Monitoring line transmitter or line receiver equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2210/00—Indexing scheme relating to optical transmission systems
    • H04B2210/08—Shut-down or eye-safety

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

To protect operating personnel in the case of optical transmission paths fed by a laser, automatic laser shut-off - ALS - is provided, which can be activated via monitoring circuits. For measuring purposes, an activation facility is also required for the laser transmitter, even when the ALS function is active. However, this reconnection must not occur unintentionally, as a result of error. For this reason, the monitoring circuits are terminated according to the invention on the output side together with a timer which is to be regularly reset by a module computer, via a logic circuit which generates the actual activation command for the laser transmitter. <IMAGE>
NO942355A 1993-06-29 1994-06-20 Automatic laser switch-off (ALS) with protection against accidental reconnection NO942355L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4321601A DE4321601A1 (en) 1993-06-29 1993-06-29 Automatic laser shutdown with protection against unintentional restart

Publications (2)

Publication Number Publication Date
NO942355D0 true NO942355D0 (en) 1994-06-20
NO942355L NO942355L (en) 1994-12-30

Family

ID=6491501

Family Applications (1)

Application Number Title Priority Date Filing Date
NO942355A NO942355L (en) 1993-06-29 1994-06-20 Automatic laser switch-off (ALS) with protection against accidental reconnection

Country Status (4)

Country Link
EP (1) EP0632607A1 (en)
AU (1) AU672502B2 (en)
DE (1) DE4321601A1 (en)
NO (1) NO942355L (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2195508A (en) * 1986-09-27 1988-04-07 Stc Plc Optical fibre transmission system
US5136410A (en) * 1990-01-09 1992-08-04 Ibm Corporation Optical fiber link control safety system

Also Published As

Publication number Publication date
AU6607394A (en) 1995-01-12
DE4321601A1 (en) 1995-01-19
EP0632607A1 (en) 1995-01-04
NO942355L (en) 1994-12-30
AU672502B2 (en) 1996-10-03

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Legal Events

Date Code Title Description
FC2A Withdrawal, rejection or dismissal of laid open patent application