Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2004-10-15
2008-08-26
Pak, Sung (Department: 2874)
Optical waveguides
With optical coupler
Input/output coupler
Reexamination Certificate
active
07418171
ABSTRACT:
A method and device for sensing spatial variations and/or temperature variations in the locality of a fiber optic cable1is disclosed, wherein a broadband light source47is used to shine incident light onto a series of fiber Bragg gratings contained within zones A, B and C. Each zone contains a plurality of fiber Bragg gratings, the plurality of fiber Bragg gratings in any one zone having a substantially identical grating period, and the fiber Bragg gratings in the respective zones having different grating periods. The reflected light from each fiber Bragg grating is returned back down the fiber optic cable1and redirected via a 2×1 coupler51to a wavelength detection system53and a personal computer63. The combination of wavelength detection system53and personal computer63allow analysis of the reflected light patterns, as well as providing a user interface which enables detection of the occurrence of a spatial and/or a temperature variation. The location of the said variation along the fiber optic cable1is advantageously detectable in terms of the particular zone A, B or C in which the said variation has been sensed.
REFERENCES:
patent: 4761073 (1988-08-01), Meltz et al.
patent: 4806012 (1989-02-01), Meltz et al.
patent: 5401956 (1995-03-01), Dunphy et al.
patent: 5513913 (1996-05-01), Ball et al.
patent: 5945666 (1999-08-01), Kersey et al.
patent: 5966481 (1999-10-01), Jolley et al.
patent: 6674928 (2004-01-01), Johnson et al.
patent: 2003/0223687 (2003-12-01), Blomquist et al.
patent: 2004/0086245 (2004-05-01), Farroni et al.
patent: 0 438 747 (1991-07-01), None
patent: 2 268 581 (1994-01-01), None
patent: 2 337 593 (1999-11-01), None
Grattan Kenneth Thomas Victor
Sun Tong
Zhao Weizhong
Kidde IP Holdings Limited
Merchant & Gould P.C.
Pak Sung
Tran Hoang
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