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Fiber optics apparatus and method for accurate current sensing
(United States. Patent and Trademark Office, 1999-11-16)
The fiber optics sensor includes a polarization maintaining optic fiber forming an optical loop, and a sensing medium coupled to the optic fiber and disposed generally midway in the optical loop. First and second quarter ...
Open loop signal processing circuit and method for a fiber optic interferometric sensor
(United States. Patent and Trademark Office, 1999-11-02)
A signal processing circuit (10) for a fiber optic sensor (12) includes a d.c. block (14) coupled to the fiber optic sensor (12) for removing d.c. components from the fiber optic sensor output signal, and a low pass filter ...