Ranging of reflective markers in optical fiber sensors by double-pass phase modulation

Daniele Inaudi; Sandra LLoret

doi:10.1117/1.601124

1 September 1997 Ranging of reflective markers in optical fiber sensors by double-pass phase modulation

Daniele Inaudi, Sandra LLoret

Optical Engineering, Vol. 36, Issue 9, (September 1997). https://doi.org/10.1117/1.601124

A novel demodulation scheme for the ranging of reflective markers is presented. This method is useful for implementing in-line multiplexing of displacement and temperature sensors based on lowcoherence interferometry. It allows the discrimination of reflective markers such as air-gap connectors or other partial reflectors spaced by as little as 0.1 m and the measurement of deformations occurring between two successive reflectors with a resolution of 2 ?m. The multiplexing of two displacement sensors is demonstrated experimentally. This type of sensor is especially useful for the long-time geometrical monitoring of large structures.

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Daniele Inaudi and Sandra LLoret "Ranging of reflective markers in optical fiber sensors by double-pass phase modulation," Optical Engineering 36(9), (1 September 1997). https://doi.org/10.1117/1.601124

Published: 1 September 1997

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