Fiber optic security seal including plural Bragg gratings

Forman, P R

Title: Fiber optic security seal including plural Bragg gratings

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Abstract

An optical security system enables the integrity of a container seal to be remotely interrogated. A plurality of Bragg gratings is written holographically into the core of at least one optical fiber placed about the container seal, where each Bragg grating has a predetermined location and a known frequency for reflecting incident light. A time domain reflectometer is provided with a variable frequency light output that corresponds to the reflecting frequencies of the Bragg gratings to output a signal that is functionally related to the location and reflecting frequency of each of the Bragg gratings. 2 figs.

Inventors:: Forman, P R

Issue Date:: 1994-09-27

OSTI Identifier:: 6903308

Patent Number(s):: 5351324

Application Number:: PPN: US 8-120113

Assignee:: Univ. of California, Alameda, CA (United States)

DOE Contract Number:: W-7405-ENG-36

Resource Type:: Patent

Resource Relation:: Patent File Date: 10 Sep 1993

Country of Publication:: United States

Language:: English

Subject:: 98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION; CONTAINERS; SECURITY SEALS; DESIGN; BRAGG REFLECTION; DIFFRACTION GRATINGS; HOLOGRAPHY; OPERATION; OPTICAL FIBERS; FIBERS; GRATINGS; PHYSICAL PROTECTION DEVICES; REFLECTION; SEALS; 055001* - Nuclear Fuels- Safeguards, Inspection, & Accountability- Technical Aspects

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                    Forman, P R. Fiber optic security seal including plural Bragg gratings.  United States: N. p., 1994. 
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                    Forman, P R. Fiber optic security seal including plural Bragg gratings.  United States.

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                    Forman, P R. Tue .  
        "Fiber optic security seal including plural Bragg gratings".  United States.

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@article{osti_6903308,

  title        = {Fiber optic security seal including plural Bragg gratings},

  author       = {Forman, P R},

  abstractNote = {An optical security system enables the integrity of a container seal to be remotely interrogated. A plurality of Bragg gratings is written holographically into the core of at least one optical fiber placed about the container seal, where each Bragg grating has a predetermined location and a known frequency for reflecting incident light. A time domain reflectometer is provided with a variable frequency light output that corresponds to the reflecting frequencies of the Bragg gratings to output a signal that is functionally related to the location and reflecting frequency of each of the Bragg gratings. 2 figs.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1994},

  month        = {9}

}

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