FBG sensor interrogation method using semiconductor optical...

Details FBG sensor interrogation method using semiconductor optical... FBG sensor interrogation method using semiconductor optical...

2007-09-04

2007-09-04

Bovernick, Rodney (Department: 2874)

Optical waveguides

Optical waveguide sensor

C385S037000, C356S073100

Reexamination Certificate

active

11325983

ABSTRACT:
A sensor device that uses a number of bragg grating (FBG) sensors and novel interrogation system with a ring cavity configuration for simultaneous time-division-multiplexex (TDM) and wavelength-division-multiplexed (WDM) interrogation of FBG sensors. The ring cavity includes an amplifier, and output coupler and an optical circulator. The coupler is connected to a wavelength measuring system and the optical circulator is connected to the FBG sensors. The FBG sensors can be in a number of groups. TDM interrogation is applied to each group of FBG sensors while WDM interrogation is applied to each FBG sensors within each group.

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patent: 6449047 (2002-09-01), Bao et al.
patent: 6571027 (2003-05-01), Cooper et al.
patent: 7046349 (2006-05-01), Everall et al.
patent: 2002/0025097 (2002-02-01), Cooper et al.

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