CA2032209A1 - Optical fiber link control safety system - Google Patents

Optical fiber link control safety system

Info

Publication number
CA2032209A1
CA2032209A1 CA2032209A CA2032209A CA2032209A1 CA 2032209 A1 CA2032209 A1 CA 2032209A1 CA 2032209 A CA2032209 A CA 2032209A CA 2032209 A CA2032209 A CA 2032209A CA 2032209 A1 CA2032209 A1 CA 2032209A1
Authority
CA
Canada
Prior art keywords
output
transmitter
redundant
detecting
control signals
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
CA2032209A
Other languages
French (fr)
Other versions
CA2032209C (en
Inventor
Gerald Michael Heiling
David Ardel Knodel
Michael Joseph Peterson
Brian Andrew Schuelke
David Warren Siljenberg
Ronald Lee Soderstrom
John Thomas Trnka
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.)
International Business Machines Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2032209A1 publication Critical patent/CA2032209A1/en
Application granted granted Critical
Publication of CA2032209C publication Critical patent/CA2032209C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
    • 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
    • H04B10/0795—Performance monitoring; Measurement of transmission parameters
    • H04B10/07955—Monitoring or measuring power
    • 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
    • H04B10/25—Arrangements specific to fibre transmission
    • 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
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2589—Bidirectional transmission

Abstract

ABSTRACT

A fully redundant safety interlock system is provided comprising, means for detecting the loss of light on a fiber optic link; controller means, coupled to said means for detecting, for determining the safety condition of the link based on the output of said means for detecting, and for controlling the radiant energy output of an optical transmitter, based on the determined safety condition, via redundant output control signals; and means, coupled to said controller means, responsive to said redundant control signals, for interconnecting the output of said controller means to transmitter drive circuitry to thereby adjust the radiant energy output by the transmitter. According to a preferred embodiment of the invention, the controller means includes an electronic implementation of two independent state machines, each of which redundantly determines the connection state of the optical link between two optical link cards. The output from the state machines is used to adjust (for example, turn on and turn off) the drive circuitry for the transmitter via fully redundant paths which carry the redundant control signals.
CA002032209A 1990-01-09 1990-12-13 Optical fiber link control safety system Expired - Lifetime CA2032209C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/462,367 US5136410A (en) 1990-01-09 1990-01-09 Optical fiber link control safety system
US07/462,367 1990-01-09

Publications (2)

Publication Number Publication Date
CA2032209A1 true CA2032209A1 (en) 1991-07-10
CA2032209C CA2032209C (en) 1994-01-18

Family

ID=23836184

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002032209A Expired - Lifetime CA2032209C (en) 1990-01-09 1990-12-13 Optical fiber link control safety system

Country Status (9)

Country Link
US (1) US5136410A (en)
EP (1) EP0437162A3 (en)
JP (1) JPH0667391B2 (en)
KR (1) KR940007470B1 (en)
CN (1) CN1021394C (en)
AU (1) AU635798B2 (en)
BR (1) BR9100035A (en)
CA (1) CA2032209C (en)
TW (1) TW215133B (en)

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Also Published As

Publication number Publication date
AU6787590A (en) 1991-07-11
CN1021394C (en) 1993-06-23
KR940007470B1 (en) 1994-08-18
JPH03212266A (en) 1991-09-17
US5136410A (en) 1992-08-04
EP0437162A3 (en) 1992-05-13
JPH0667391B2 (en) 1994-08-31
BR9100035A (en) 1991-10-22
KR910015137A (en) 1991-08-31
EP0437162A2 (en) 1991-07-17
TW215133B (en) 1993-10-21
CN1054692A (en) 1991-09-18
CA2032209C (en) 1994-01-18
AU635798B2 (en) 1993-04-01

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Effective date: 20101213