Application of fibre-optic rotational seismometer in investigation of seismic rotational waves

• Autorzy: Jaroszewicz L. R. , Krajewski Z.
• Języki publikacji: EN

Abstrakty

EN

Application of a fibre-optic Sagnac interferometer as a rotational seismometer is presented in this paper. It is a new device which parameters (sensitivity equal to 4.3x10⁻⁸ rad/s for 2ð) are comparable with the parameters of typical mechanical rotational seismometers. However, a direct measurement of rotation without influence of linear motions for fibre-optic rotational seismometer designed it for a direct measurement of a ground rotation component. Experimental data obtained during simultaneous application of the above two types of sensors are also presented. Research of near-field seismic events, the amplitude of which has been identified in the range of 1.5x10⁻⁶ rad/s to 2x10⁻⁷ rad/s, shows directly that, so-called, seismic rotational waves exist independently of typical seismic waves generated during earthquakes.

Słowa kluczowe

EN

fibre-optic device; interferometric sensor; earthquakes investigation; seismic rotational waves

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2008
• Tom: Vol. 16, No. 3
• Strony: 314--320
• Opis fizyczny: Bibliogr.25 poz., il., wykr.

Twórcy

autor

Jaroszewicz L. R.

autor

Krajewski Z.

• Institute of Applied Physics, Military University of Technology, 2 Kaliskiego Str., 00-908 Warsaw, Poland,

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