Mode-maintained fiber optic polarized light seismic gyroscope based on quantum weak measurement

Abstract

The invention provides a mode-preserving optical fiber polarized light seismic gyroscope based on quantum weak measurement, including: a light emitting diode, a Gaussian filter, a half mirror, a first polarization controller, a polarization beam splitter, and SOLEIL-BABINET compensation detector, second autocollimation lens, first autocollimation lens, polarization maintaining fiber ring, second polarization controller, first spectrometer, second spectrometer, AD acquisition module, FPGA data processing module, DA conversion module and LED display Screen display and USB storage module; after being collected by the AD acquisition module, it is transmitted to the FPGA data processing module, and then the processed spectrum is compared with the original spectrum, and the movement of the center wavelength is calculated, and then the movement of the center wavelength and the seismic gyro The relationship between the rotational angular velocity of the instrument and the purpose of detecting the polarized light of the high-precision mode-maintaining fiber through weak measurement. The beneficial effect of the invention is that the spectrum 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 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, blasting, and environmental vibrations. Through the joint observation and interpretation of translational and rotational motions, it is of great significance for the study of strong ground motion seismology, broadband seismology, earthquake engineering, earthquake physics, earthquake instrumentation, earthquake disasters, and seismotectonics. [0003] In the past 10 years, the United States, Italy, the Un...

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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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