SE9102563L - Förfarande och apparat för att överföra information via en optisk fiber, varvid störning detekteras och/eller lokaliseras - Google Patents

Förfarande och apparat för att överföra information via en optisk fiber, varvid störning detekteras och/eller lokaliseras

Info

Publication number
SE9102563L
SE9102563L SE9102563A SE9102563A SE9102563L SE 9102563 L SE9102563 L SE 9102563L SE 9102563 A SE9102563 A SE 9102563A SE 9102563 A SE9102563 A SE 9102563A SE 9102563 L SE9102563 L SE 9102563L
Authority
SE
Sweden
Prior art keywords
wave
interference
detected
optical fiber
transmitting information
Prior art date
Application number
SE9102563A
Other languages
English (en)
Other versions
SE513651C2 (sv
Inventor
Jacques Auge
Jose Chesnoy
Philippe Darbon
Original Assignee
Cit Alcatel
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 Cit Alcatel filed Critical Cit Alcatel
Publication of SE9102563L publication Critical patent/SE9102563L/sv
Publication of SE513651C2 publication Critical patent/SE513651C2/sv

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
    • H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
    • H04B10/85—Protection from unauthorised access, e.g. eavesdrop protection

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)
SE9102563A 1990-09-21 1991-09-06 Förfarande och apparat för att överföra information via en optisk fiber, varvid störning detekteras och/eller lokaliseras SE513651C2 (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9011685A FR2738430B1 (fr) 1990-09-21 1990-09-21 Procede et dispositif de transmission d'information sur fibre optique avec detection et/ou localisation d'intrusion

Publications (2)

Publication Number Publication Date
SE9102563L true SE9102563L (sv) 2000-02-09
SE513651C2 SE513651C2 (sv) 2000-10-16

Family

ID=9400534

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9102563A SE513651C2 (sv) 1990-09-21 1991-09-06 Förfarande och apparat för att överföra information via en optisk fiber, varvid störning detekteras och/eller lokaliseras

Country Status (7)

Country Link
CA (1) CA2051913C (sv)
DE (1) DE4131009C1 (sv)
FR (1) FR2738430B1 (sv)
GB (1) GB2303753B (sv)
IT (1) IT1269223B (sv)
NL (1) NL9101538A (sv)
SE (1) SE513651C2 (sv)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6072614A (en) * 1997-08-21 2000-06-06 Nortel Networks Corporation Monitoring induced counterpropagating signals in optical communications systems

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4134642A (en) * 1976-04-16 1979-01-16 Northern Telecom Limited Optical fibre with increased security
FR2453403A1 (fr) * 1979-04-06 1980-10-31 Bertin & Cie Procede et dispositif de verification d'une fibre optique transmettant une information
US4386629A (en) * 1980-07-31 1983-06-07 Raychem Corporation Apparatus for internal pipe protection
JPS57118136A (en) * 1981-01-14 1982-07-22 Nippon Telegr & Teleph Corp <Ntt> Fault searching method by optical fiber
CA1205307A (en) * 1981-12-07 1986-06-03 Venkata A. Bhagavatula Low dispersion, low-loss single-mode optical waveguide
EP0117868B1 (en) * 1982-05-06 1989-10-04 Nippon Telegraph and Telephone Corporation Method and device for separating position of fault in light transmission line
GB8709900D0 (en) * 1987-04-27 1987-08-05 British Telecomm Surveillance system
DE3743678A1 (de) * 1987-12-23 1989-07-06 Philips Patentverwaltung Optisches rueckstreumessgeraet
JPH0227231A (ja) * 1988-07-18 1990-01-30 Nippon Telegr & Teleph Corp <Ntt> 光ファイバ長手方向ひずみ測定方法
FR2635876B1 (fr) * 1988-08-26 1992-10-16 Comp Generale Electricite Fibre optique monomode protegee contre le detournement d'informations transmises et procede de transmission utilisant cette fibre

Also Published As

Publication number Publication date
NL9101538A (nl) 1997-03-03
GB2303753B (en) 1997-07-09
CA2051913C (fr) 1999-02-16
IT1269223B (it) 1997-03-21
DE4131009C1 (de) 1997-05-22
ITTO910710A0 (sv) 1991-09-19
FR2738430B1 (fr) 1998-03-13
ITTO910710A1 (it) 1993-03-19
CA2051913A1 (en) 1996-12-06
GB9119976D0 (en) 1997-01-08
SE513651C2 (sv) 2000-10-16
FR2738430A1 (fr) 1997-03-07
GB2303753A (en) 1997-02-26

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Legal Events

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