Licensable Technologies : Engineering : Membranes

Fiber Optic Security Seal Including Plural Bragg Gratings

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.

IP Status: Available Exclusively

Reference Number: 52

S Number: DOE reference no.(s): 75,083

Patents & Applications:
United States National Patent Number 5351324 Issued on 09/27/1994

Posted: 08-10-2004

Contact
John Mott
Technology Transfer Division
Los Alamos National Laboratory
P.O. Box 1663, MailStop C334
(505) 665-0883
jmott@lanl.gov