Apparatus for pressure sensing

Details Apparatus for pressure sensing Apparatus for pressure sensing

2006-03-09

2011-10-04

Healy, Brian M. (Department: 2883)

Optical waveguides

Directional optical modulation within an optical waveguide

Electro-optic

C385S012000, C385S013000, C385S037000, C356S035500, C250S227140, C250S227170

Reexamination Certificate

active

08031988

ABSTRACT:
The present invention provides an apparatus for pressure sensing. The apparatus comprises a light guide, a Bragg grating incorporated into the light guide and a moveable wall portion. The moveable wall portion has opposite first and second sides and is being positioned so that a change in pressure at one of the sides relative to a pressure at the other side will move the moveable wall portion. The moveable wall portion is coupled to the Bragg grating so that the movement of the moveable wall portion causes a force on a side of the Bragg grating. The force has a component that is transversal to the Bragg grating and effects a change in strain of the Bragg grating and thereby a change in an optical period of the Bragg grating.

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