Optical waveguides – Optical waveguide sensor
Reexamination Certificate
2005-04-12
2005-04-12
Assaf, Fayez G. (Department: 2872)
Optical waveguides
Optical waveguide sensor
C385S037000, C385S042000, C385S045000, C385S047000, C385S048000, C356S478000
Reexamination Certificate
active
06879742
ABSTRACT:
The present invention provides a fiber Bragg grating sensor system, which comprises a light-division device having receiving-sending terminals and sensing terminals, a light generating device and a photo detector coupled with receiving-sending terminal of a light-division device, sensing fibers coupled with the sensing terminals, said sensing fiber comprising a fiber Bragg grating, a information processor connecting with said photo detector. The light-division device distribute different optical energy ratio from said receiving-sending terminals to said sensing terminals. The intensity and wavelength division multiplexing can make different intensity for the information addressed of different sensing fiber on the same optical channel to enhance the sensing capacity of fiber Bragg grating sensor system.
REFERENCES:
patent: 6256090 (2001-07-01), Chen et al.
patent: 6647160 (2003-11-01), Chi et al.
M.A. Davis, et al.; Interrogation of 60 fibre Bragg grating sensors with microstrain resolution capability; Jul. 1996; pp. 1393-1394.
L. Zhang et al.; Enhanced FBG Strain Sensing Multiplexing Capacity Using Combination of Intensity and Wavelength Dual-Coding Technique; Dec. 1999; pp. 1638-1640.
Chi Chiu Chan et al.; Performance Analysis of a Time-Division-Multiplexed Fiber Bragg Grating Sensor Array by Use of a Tunable Laser Source ; Sep./Oct. 2000; pp. 741-749.
K.P. Koo et al.; Dense wavelength division multiplexing of fibre Bragg grating sensers using CDMA; Jan. 1999; vol. 35, No. 2, pp. 165-167.
Chi Sien
Lin Jia-He
Peng Peng-Chun
Tseng Hong-Yih
Assaf Fayez G.
National Chiao Tung University
Troxell Law Office PLLC
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