Fiber optic transducer

Details Fiber optic transducer Fiber optic transducer

1987-04-09

1988-07-19

Willis, Davis L.

Optics: measuring and testing

By particle light scattering

With photocell detection

250227, 356352, G01B 902

Patent

active

047580879

ABSTRACT:
An optical physical condition sensor includes an optical fiber resonant cavity into which optical energy, including wavelengths resonatable within the cavity, is introduced. External physical conditions, such as temperature or pressure, change the effective optical path length within the cavity to cause a corresponding change in the cavity's resonant characteristics. Changes in the sensed condition can be determined as a function of changes in the wavelength of optical energy peaks or minimas in the cavity or changes in the cavity's finesse characteristics.

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Hill et al, "CW Brillouin Laser", App. Phys. Lett., vol. 28, No. 10, pp. 608-609, 5/76.
Haavisto et al., "Resonance Effects in Low-Loss Ring Waveguides", Opt. Lett., vol. 5, No. 12, pp. 510-512, 12/80.

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