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Title:
【発明の名称】光ファイバに加えられる応力検出器
Document Type and Number:
Japanese Patent JPH02503829
Kind Code:
A
Abstract:
Shocks or sudden stresses caused by attempts to tap into an optical fibre network are detected by monitoring the "speckle pattern" produced by intermodal interference at the output of a multimode fibre (2). The fibre is a single mode optical fibre communication link through which a monitoring beam having a wavelength at which the fibre supports multiple propagation modes is also transmitted.

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Inventors:
Hill, Gottofferyi Lichyard
Stanley, Ian William
White, kenneth ian
Application Number:
JP50360289A
Publication Date:
November 08, 1990
Filing Date:
March 10, 1989
Export Citation:
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Assignee:
Buritetsushiu Telecomunications Public Limited Company
International Classes:
G01M11/00; G01D5/353; G02B6/00; H04B10/85; (IPC1-7): G01M11/00; G02B6/00; H04B10/00
Attorney, Agent or Firm:
Takehiko Suzue (3 outside)



 
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