Multi-parameter measurement system based on micro-structure optical fiber interference microwave photon sensing method and method

Abstract

The invention provides a multi-parameter measurement system based on a micro-structure optical fiber interference microwave photon sensing method and method. The system mainly comprises a broad-spectrum light source (1), an optical filter (2), a 3dB optical fiber coupler (3), an adjustable optical delay line (4), an adjustable optical attenuator (5), a micro-structure optical fiber ring (6), a 2*2optical fiber coupler (7), an interference sensing unit (8), a spectral analyzer (9), an electro-optic modulator (10), a dispersion unit (11), a photodetector (12) and a vector network analyzer (13).By combining the optical fiber interference structure and the micro-structure optical fiber ring, multi-parameter sensing can be realized; and besides, in combination of the microwave photon filter,conversion from spectral measurement to frequency domain measurement is realized, the sensing sensitivity is thus greatly improved, and the simultaneous multi-parameter measurement ability is also achieved.

Description

technical field [0001] The invention relates to the fields of microwave photons, optoelectronics, fiber optics, and fiber optic sensing technology, and in particular to a multivariate parameter measurement system and method based on a microstructure optical fiber interference microwave photon sensing method. Background technique [0002] Major civil engineering structures, such as bridges, dams, tunnels, railways, etc., will inevitably be damaged by various natural and human factors during long-term use. widespread attention of the people. In the health monitoring of major engineering structures, it is often necessary to comprehensively analyze and judge the internal stress characteristics of the structure, temperature changes, and even its environmental parameters such as refractive index, so as to make a correct assessment of its internal damage. Therefore, the development of a high-precision detection system with simultaneous measurement of multiple parameters has become...

AI Technical Summary

Problems solved by technology

[0004] At present, conventional fiber grating sensors can only measure parameters such as temperature and stress, and cannot realize simultaneous sensitivity of multiple parameters; Disadvantages such as cross sensitivity

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