Abstract
A prototype of a mobile laser seismometer based on a multiturn fiber-optic sensitive element and an adaptive holographic interferometer is developed. The possibility of recording weak seismic waves propagating in the “land-sea” interface region by the laser seismometer is shown. The original multiturn design of the sensitive element of the seismometer provides a threshold sensitivity of 1.6 · 10−7 m/s2 to seismic acceleration. The long-term operation stability of the laser seismometer is provided due to adaptive properties of the interferometer constructed using a dynamic hologram formed in the photorefractive bismuth titanate crystal.
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Original Russian Text © O.T. Kamenev, Yu.S. Petrov, R.V. Hizhnyak, I.N. Zavestovskaya, Yu.N. Kulchin, R.V. Romashko, 2017, published in Kratkie Soobshcheniya po Fizike, 2017, Vol. 44, No. 7, pp. 27–31.
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Kamenev, O.T., Petrov, Y.S., Hizhnyak, R.V. et al. Mobile adaptive holographic laser seismometer. Bull. Lebedev Phys. Inst. 44, 202–204 (2017). https://doi.org/10.3103/S1068335617070041
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DOI: https://doi.org/10.3103/S1068335617070041