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 |
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Pages (from-to) | 1578-1586 |
Number of pages | 9 |
Journal | Journal of Lightwave Technology |
Volume | 15 |
Issue number | 8 |
DOIs | |
Publication status | Published - 1997 Aug 1 |
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics