Fiber-optic/photoelastic device measures gas pressures up to 600 psi at operating temperatures as high as 1,100 degrees C. Pressure on fused-silica sensing element gives rise to birefringence via photoelastic effect. Polarization of light changed by birefringence; change in polarization measured and used to infer pressure causing it. Device prototype of gas-pressure sensor for aircraft engine. Mounted in engine at or near desired measurement point, where it responds to both time-varying and steady components of pressure.
Fiber-Optic Photoelastic Device Senses Pressure Of Hot Gas
NASA Tech Briefs ; 19 , 6
1995-06-01
Miscellaneous
No indication
English
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