Optical waveguides – With optical coupler – Input/output coupler
Patent
1993-09-10
1994-09-27
Healy, Brian
Optical waveguides
With optical coupler
Input/output coupler
385 15, 385 38, 385 12, 356 32, 356 355, 356345, 356347, 359 15, 359 27, 359 34, 25022718, 25022719, 25022714, G02B 634, G01B 1116, H01J 516
Patent
active
053513240
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.
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Healy Brian
The Regents of the University of California, Office of Technolog
Wilson Ray G.
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