16 May 2017 Construction and laboratory test of the fiber optic rotational seismograph FOSREM for rotational seismology area of interest
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Abstract
A relatively young field of study named Rotational Seismology caused a highly interest in an investigation of rotational movements generated by earthquakes, explosions, and ambient vibrations. It includes a wide range of scientific branches. However, this field needs to apply appropriate rotational sensors which should fulfill restrict technical requirements. The presented in this work system FOSREM (Fibre-Optic System for Rotational Events and Phenomena Monitoring) seems to be a promising rotational sensor for such investigation. FOSREM works by measuring the Sagnac effect and generally consists of two basic elements: optical sensor and electronic part. Regarding to its theoretical sensitivity equals 2·10-8 rad/s/Hz1/2, it enables to measure rotation in a wide range of signal amplitude (10-8 rad/s ÷ 10 rad/s) and frequency (DC ÷ 328.12 Hz). Moreover, FOSREM is mobile and remotely controlled via Internet using a special designed software.
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Anna Kurzych, Leszek R. Jaroszewicz, Jerzy K. Kowalski, "Construction and laboratory test of the fiber optic rotational seismograph FOSREM for rotational seismology area of interest", Proc. SPIE 10231, Optical Sensors 2017, 102311P (16 May 2017); doi: 10.1117/12.2265590; https://doi.org/10.1117/12.2265590
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