Low-coherence interferometry optical sensor using a single...

Details Low-coherence interferometry optical sensor using a single... Low-coherence interferometry optical sensor using a single...

2007-08-21

2007-08-21

Turner, Samuel A. (Department: 2877)

Optics: measuring and testing

By light interference

Using fiber or waveguide interferometer

C356S491000

Reexamination Certificate

active

10976863

ABSTRACT:
The invention provides a method and a system for measuring a physical quantity by means of a tandem interferometer optical sensor system based on low-coherence interferometry. The system comprises a light system, a sensing interferometer and a polarization readout interferometer. The invention provides a polarization interferometer comprising a single birefringent wedge. The invention also provides for a dispersion-compensated optical sensor system. The invention also provides an interferometer sensitive to temperature that comprises a trajectory in a LiB3O5crystal with an x-cut orientation.

REFERENCES:
patent: 5349439 (1994-09-01), Graindorge et al.
patent: 5781293 (1998-07-01), Padgett et al.
patent: 6519040 (2003-02-01), Amos
Fiber-Optic “White-Light” birefringent temperature sensor, Mariller et al, SPIE vol. 798, 1987, pp. 121-130.
Influence of dispersion on sensitivity of highly birefringent fibers to temperature and hydrostatic pressure, Urbanczyk et al, Applied Optics, May 1998, pp. 3176-3180.
Thermal dependence of the principal refractive indices of lithium triborate, Tang et al, Journal of the Optical Society of America, Apr. 1995, pp. 638-643.

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