Polymer based distributive waveguide sensor for pressure and...

Details Polymer based distributive waveguide sensor for pressure and... Polymer based distributive waveguide sensor for pressure and...

2007-11-13

2007-11-13

Kim, Ellen E. (Department: 2874)

Optical waveguides

Optical waveguide sensor

Including physical deformation or movement of waveguide

C385S037000

Reexamination Certificate

active

11068938

ABSTRACT:
According to embodiments of the present invention, a distributed pressure and shear stress sensor includes a flexible substrate, such as PDMS, with a waveguide formed thereon. Along the waveguide path are several Bragg gratings. Each Bragg grating has a characteristic Bragg wavelength that shifts in response to an applied load due to elongation/compression of the grating. The wavelength shifts are monitored using a single input and a single output for the waveguide to determine the amount of applied pressure on the gratings. To measure shear stress, two flexible substrates with the waveguide and Bragg gratings are placed on top of each other such that the waveguides and gratings are perpendicular to each other. To fabricate the distributive pressure and shear sensor, a unique micro-molding technique is used wherein gratings are stamped into PDMS, for example.

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patent: WO 03/076887 (2003-09-01), None
patent: PCT/US2005/006746 (2005-06-01), None

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