Security system responsive to optical fiber having Bragg grating

Details Security system responsive to optical fiber having Bragg grating Security system responsive to optical fiber having Bragg grating

1995-11-14

1997-05-27

Palmer, Phan T. H.

Optical waveguides

Miscellaneous

385 37, 385 12, 385 38, 70DIG46, 25022714, G02B 6124

Patent

active

056339755

ABSTRACT:
An optically responsive electronic lock is disclosed comprising an optical fiber serving as a key and having Bragg gratings placed therein. Further, an identification system is disclosed which has the optical fiber serving as means for tagging and identifying an object. The key or tagged object is inserted into a respective receptacle and the Bragg gratings cause the optical fiber to reflect a predetermined frequency spectra pattern of incident light which is detected by a decoder and compared against a predetermined spectrum to determine if an electrical signal is generated to either operate the lock or light a display of an authentification panel.

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patent: 4447123 (1984-05-01), Page et al.
patent: 4725110 (1988-02-01), Glenn et al.
patent: 5351324 (1994-09-01), Forman

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