All fiber autocorrelator

Details All fiber autocorrelator All fiber autocorrelator

2005-01-25

2005-01-25

Turner, Samuel A. (Department: 2877)

Optics: measuring and testing

By light interference

Using fiber or waveguide interferometer

Reexamination Certificate

active

06847453

ABSTRACT:
An autocorrelator apparatus and method for economically measuring physical properties of an object where the measurement path is at least semi-translucent to light, such as thicknesses in multilayered optical structures, group index of refraction, and distance to a surface. The apparatus includes a non-coherent light fiber interferometer and an optional coherent light fiber interferometer in association so as to share PZT fiber modulators. Thickness and boundary extent measurements can be made, for example, of solids, liquids, liquids moving along a horizontal plane, or liquids flowing down a plane.

REFERENCES:
patent: 5206924 (1993-04-01), Kersey
patent: 5633712 (1997-05-01), Venkatesh et al.
patent: 5867268 (1999-02-01), Gelikonov et al.
patent: 6014215 (2000-01-01), Kempen et al.
Bush, Jeff, Davis, Pepe, Marcus, Michael A., “All-Fiber Optic Coherence Domain Interferometric Techniques,” Mar. 2001, pp. 1-10,SPIE Photonics East 2000, Boston, Ma.,4204A-08.

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