High-resolution photoelastic pressure sensor using low-birefringence fiber.
The effect of birefringence induced in a single-mode fiber by a lateral force has been applied to measure the absolute value of force or pressure with high resolution. A sensor configuration with an extended detecting surface has been investigated by means of calibrated weights. The sensor is sensitive to an incremental force of 2 x 10(-3) N, independently of the length of the fiber. The maximum force applied was 10 N/m of fiber length.
Bertholds
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A
Université de Neuchâtel, Institut de Microtechnique, CH-2000 Neuchâtel, Switzerland.
Dändliker
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R