An all-fiber gravitational wave measurement teaching demonstration system and demonstration method

Abstract

The present invention proposes an all-fiber gravitational wave measurement teaching and demonstration system. The monochromatic frequency-stabilized incident laser light emitted by the signal transmitting module is injected into the system by a coupler, an optical switch, a Faraday rotating mirror, an acoustic wave source, an optical fiber coil, and a soundproof box. The Michelson interference module with adjustable arm length is formed to obtain the interference signal, and the measurement, analysis and processing of the interference signal is realized through the signal acquisition and processing module composed of a photodetector and a signal analysis and processor. The present invention also proposes an all-fiber gravitational wave measurement teaching and demonstration method. Through the Michelson interferometer with adjustable arm length, the experimental demonstration of the principle of interferometric measurement and the relationship between gravitational wave sensitivity and arm length is realized, which breaks the traditional gravitational wave measurement teaching. The demonstration only formally restores the measurement system currently in use, but lacks the design of the principle demonstration. At the same time, the invention adopts progressive teaching, which is convenient to use and has intuitive experimental effects, and can be widely used in the teaching practice of physical experiments.

Description

technical field [0001] The invention belongs to the field of optics and measurement technology, in particular to an all-fiber gravitational wave measurement teaching demonstration system and method. Background technique [0002] According to general relativity, the presence of matter warps spacetime, creating gravity. Cosmic events, such as the Big Bang, the rotation of asymmetric binary stars, and supernova explosions, etc., will cause distortions in the nearby space-time structure and cause gravitational ripples, forming gravitational waves. Because of this, the measurement and research of gravitational waves has far-reaching scientific significance. [0003] At present, the commonly used gravitational wave detection devices in the world are basically based on optical interferometers. Its working principle is to convert the stress stretching of the interference arm caused by gravitational waves into the change of the light phase through the change of the light propagation...

AI Technical Summary

Problems solved by technology

[0005] The traditional gravitational wave measurement teaching and demonstration system usually highly restores the currently used LIGO for demonstration. However, for the gravitational wave measurement principle, such as the demonstration of the Michelson interferometer principle, and the sensitivity improvement principle, such as the relationship between the arm length and the system sensitivity principle, there is no clear teaching experiment display

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