High-precision mode-preserving optical fiber polarized light seismic gyroscope realized based on quantum weak measurement

Abstract

The invention provides a high-precision mode-preserving optical fiber polarized light seismic gyroscope realized based on quantum weak measurement. The polarized light seismic gyroscope comprises a light emitting diode, a Gaussian filter, a semi-reflecting and semi-transmitting mirror, a first polarization controller, a polarization beam splitter, a SOLEIL-BABINET compensator, a second auto-collimating lens, a first auto-collimating lens, a polarization maintaining optical fiber ring, a second polarization controller, a first spectrograph, a second spectrograph, an AD acquisition module, an FPGA data processing module, a DA conversion module and an LED display screen display and USB storage module. Polarized light is transmitted to the FPGA data processing module after being acquired by the AD acquisition module, the processed spectrum is compared with the initial spectrum, the movement of the central wavelength is calculated, the relationship between the movement of the central wavelength and the rotation angular velocity of the seismic gyroscope is further obtained, and the purpose of detecting the polarized light of the high-precision mode-preserving optical fiber through weak measurement is achieved. The polarized light seismic gyroscope has the beneficial effects that the spectral measurement based on the frequency domain has higher signal-to-noise ratio and sensitivity.

Description

technical field [0001] The invention relates to the field of seismic gyroscopes, in particular to a high-precision mode-maintaining optical fiber polarized light seismic gyroscope based on quantum weak measurement. Background technique [0002] With the continuous development of seismology and the continuous improvement of measurement technology, a new interdisciplinary subject - rotational seismology has become the focus of earthquake research scholars. Rotational seismology is an emerging discipline that comprehensively studies the rotational motion of the ground caused by earthquakes, blasts and environmental vibrations. Through the combined observation and interpretation of translational motion and rotational motion, it is of great significance to the study of strong ground motion seismology, broadband seismology, earthquake engineering, earthquake physics, earthquake instrumentation, earthquake hazards, and earthquake structures. [0003] Over the past 10 years, countr...

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Problems solved by technology

[0006] With the vigorous development of quantum information technology, the measurement technology of amplifying small signals based on quantum weak measurement has been widely used, but the research of the existing technology does not meet the requirements of the weak seismic wave measurement device

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