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Method of identifying a particular optical cable out of a number of similar optical cables

  • US 5,329,348 A
  • Filed: 10/05/1992
  • Issued: 07/12/1994
  • Est. Priority Date: 10/04/1991
  • Status: Expired due to Term
First Claim
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1. A method of identifying a particular optical cable out of a number of similar optical cables laid along a same route of installation comprising steps of sequentially applying an external signal at an intermediate point of each of the optical cables on a one by one basis by a signal applying means while transmitting an optical signal from a signal transmitting means to a signal receiving/detecting means by way of a particular optical fiber in each of the optical cables and detecting by the signal receiving/detecting means any fluctuation of the optical signal transmitted through the particular optical cable caused by the photoelastic effect when an external signal is applied to the particular cable, characterized in that a plurality of external signals are sequentially applied at respective spots on the outer peripheral surface of each of the optical cables.

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