Abstract
Recent geophysical research includes measurement of seismic events in non-trivial surroundings. Seismic sensors have to be installed in very deep boreholes as well as in volcanic regions at measuring sites with temperatures above 250°C and with several km of transmission lines between sensor and signal processing. The application in a three-dimensional seismic network requires detection of vibration amplitudes Δs=0.1nm. 100μm at frequencies 0.1Hz..30Hz. Under these conditions, interferometric detection and signal transmission using optoelectronic and fibre-optic components of photonic technology seems to be the only possibility to perform long-term measurement of seismic waves. In this paper, results are presented concerning high-temperature parameters of fibre-optic key components and interferometer construction, signal processing for evaluation of optical phase, and first results of the sensor test.
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© 1997 Springer Science+Business Media New York
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Ecke, W., Jäckel, KH., Pfeifer, P., Schauer, J., Willsch, R. (1997). Fibre Optic Remote Displacement Sensor for Seismic Events at High Temperature. In: Lampropoulos, G.A., Lessard, R.A. (eds) Applications of Photonic Technology 2. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9250-8_116
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DOI: https://doi.org/10.1007/978-1-4757-9250-8_116
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