Simultaneous measurement of temperature and strain using optical

Details Simultaneous measurement of temperature and strain using optical Simultaneous measurement of temperature and strain using optical

1998-02-19

2000-05-02

Bennett, G. Bradley

Thermal measuring and testing

Temperature measurement

Nonelectrical, nonmagnetic, or nonmechanical temperature...

356 32, 356345, 374142, G01K 900, G01K 1100, G01B 902, G01B 1100

Patent

active

060564369

ABSTRACT:
Cascaded waveguide sensors with different sensitivities to temperature and strain produce independent temperature and strain measurements. In one embodiment a first sensor is formed of a first optical material having a corresponding first sensible thermomechanical response and a second sensor is formed of a second optical material having a corresponding second sensible thermomechanical response. The first and second thermomechanical responses are sufficiently different so as to produce independent temperature and strain measurements. Particular embodiments employ intrinsic or extrinsic Fabry-Perot interferometers (IFP, EFP),sensors, in-line fiber etalon (ILFE) sensor and a fiber-optic Bragg grating.

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