Fiber bragg crating sensor interrogation method
First Claim
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1. A method of monitoring a plurality of FBG transducers distributed along a single optical fiber, comprisingdirectly connecting to a single point of said single optical fiber an integrated optic sensor microchip having a planar waveguide structure including a plurality of ports located along the edges of said microchip waveguide;
- interrogating said FBG transducers with a broadband spectrum light source coupled to said fiber through one of said ports located along the edges of said microchip waveguide; and
receiving at others of said ports located along the edges of said microchip waveguide the respective wavelength-encoded signatures of said FBG transducers in response to said interrogating.
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Abstract
The invention discloses multi-channel fiber Bragg grating (FBG) interrogation systems and manufacture thereof. The multi-channel fiber Bragg-grating sensor interrogation unit comprises at least one integrated optic sensor microchip and a signal processing IC-electronics unit in a miniaturized, telecommunications standard, hermetically sealed 2-cm×5-cm SFF single fiber package.
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12 Claims
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1. A method of monitoring a plurality of FBG transducers distributed along a single optical fiber, comprising
directly connecting to a single point of said single optical fiber an integrated optic sensor microchip having a planar waveguide structure including a plurality of ports located along the edges of said microchip waveguide; -
interrogating said FBG transducers with a broadband spectrum light source coupled to said fiber through one of said ports located along the edges of said microchip waveguide; and receiving at others of said ports located along the edges of said microchip waveguide the respective wavelength-encoded signatures of said FBG transducers in response to said interrogating. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of monitoring the status of a plurality of FBG transducers distributed along a single optical fiber, comprising
having directly connected to a single point of said single optical fiber an integrated optic sensor microchip having a planar waveguide including a plurality of ports located along the edges of said microchip waveguide; -
applying through one of said ports located along the edges of said integrated optic sensor microchip integrated planar waveguide a broad band spectrum light to interrogate said FBG transducers; and receiving at others of said ports located along the edges of said microchip waveguide the respective wavelength-encoded signatures of said FBG transducers in response to said applying of said broadband spectrum light.
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Specification