Fiber optic sensing device for measuring a physical parameter

Details Fiber optic sensing device for measuring a physical parameter Fiber optic sensing device for measuring a physical parameter

2006-08-29

2006-08-29

Pham, Hoa Q. (Department: 2877)

Optics: measuring and testing

By light interference

Using fiber or waveguide interferometer

C356S454000, C356S243100, C356S479000

Reexamination Certificate

active

07099015

ABSTRACT:
A fiber optic sensing device uses a Fabry-Perot cavity to sense a physical parameter. The cavity modulates the incident polychromatic light. The modulated light is recorded by an optical spectrometer means. The spectrum is analyzed in a signal processing unit which normalizes the spectrum and determines the phase of the modulated signal. The phase, accumulated over whole range of wavelengths, has been used for identification of the physical parameter using a look-up-table. The cavity, the polychromatic light source and the spectroscope means are connected by fiber optic means.

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