Passive signal processing of in-line fiber etalon sensors for high strain-rate loading

Yun Lung Lo; James S. Sirkis; Chia Chen Chang

doi:10.1109/50.618393

Passive signal processing of in-line fiber etalon sensors for high strain-rate loading

Yun Lung Lo, James S. Sirkis, Chia Chen Chang

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

60 Citations (Scopus)

Abstract

This paper describes the development of a passively demodulated optical fiber sensor system capable of accommodating the high strain-rate events commonly encountered in applications involving stress wave propagation. This sensor system, which is based on in-line fiber etalon (ILFE) sensors and path-matched differential interferometry (PMDI), was tested experimentally at low frequency and strain-rates (time derivative of strain) up to (∼10⁷ με/s). For the present system, this strain-rate corresponds to a sensor phase bandwidth of approximately 100 kHz. Characterization tests using sensor gauge lengths ranging from 260 to 350 μm showed that the sensor system had a minimum detectable phase of ∼2 microrad/√Hz rms at 2 kHz which corresponds to ∼0.8 nε/√Hz rms for 260 μm-gauge length sensor.

Original language	English
Pages (from-to)	1578-1586
Number of pages	9
Journal	Journal of Lightwave Technology
Volume	15
Issue number	8
DOIs	https://doi.org/10.1109/50.618393
Publication status	Published - 1997 Aug 1

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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abstract = "This paper describes the development of a passively demodulated optical fiber sensor system capable of accommodating the high strain-rate events commonly encountered in applications involving stress wave propagation. This sensor system, which is based on in-line fiber etalon (ILFE) sensors and path-matched differential interferometry (PMDI), was tested experimentally at low frequency and strain-rates (time derivative of strain) up to (∼107 με/s). For the present system, this strain-rate corresponds to a sensor phase bandwidth of approximately 100 kHz. Characterization tests using sensor gauge lengths ranging from 260 to 350 μm showed that the sensor system had a minimum detectable phase of ∼2 microrad/√Hz rms at 2 kHz which corresponds to ∼0.8 nε/√Hz rms for 260 μm-gauge length sensor.",

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