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Sensitivity amplification method and device based on virtual reference interference, equipment and medium

A virtual reference and sensitivity technology, applied in the field of interferometric sensing, can solve the problems of high cost, lower the detection limit of high-precision measurement, etc., and achieve the effect of reducing cost and simplifying the sensing structure

Active Publication Date: 2021-07-23
GUANGZHOU UNIVERSITY
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Problems solved by technology

However, envelope fitting can only sample a small number of points, greatly reducing the detection limit in high-precision measurements
In addition, the measurement requires a costly tunable laser

Method used

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  • Sensitivity amplification method and device based on virtual reference interference, equipment and medium
  • Sensitivity amplification method and device based on virtual reference interference, equipment and medium
  • Sensitivity amplification method and device based on virtual reference interference, equipment and medium

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Embodiment Construction

[0085] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0086] The embodiment of the present invention realizes the simplification of the sensing structure and reduces the cost by providing a sensitivity amplification method, device, equipment and medium based on virtual reference interference.

[0087] The embodiment of the present invention discloses a sensitivity amplification method based on virtual reference interference, including:

[0088] Inputting two beams of interfering light, calculating the intensity of interference according to the intensity of the two beams of interfering light and the effective refractive index ...

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Abstract

The invention discloses a sensitivity amplification method and device based on virtual reference interference, equipment and a medium. The method comprises the following steps: performing interference intensity calculation according to the intensity of interference light and the effective refractive index of the interference light to determine the interference light intensity of a sensing interferometer; modulating the interference light intensity of the sensing interferometer to determine a modulation result; performing construction processing on the modulation result to determine the interference light intensity of a virtual reference interference spectrum; according to the interference spectrum of the sensing interferometer and the virtual reference interference spectrum, determining a superposition spectrum and an envelope of a vernier effect; determining the sensitivity of the sensing interferometer and the sensitivity of the envelope of the vernier effect according to the interference spectrum of the sensing interferometer and the envelope of the vernier effect; and determining an amplification coefficient according to the sensitivity of the sensing interferometer and the envelope sensitivity of the vernier effect. According to the invention, the manufacturing cost is reduced, the sensing sensitivity is improved, the sensing universality is improved, and the method can be widely applied to the technical field of interference type sensing.

Description

technical field [0001] The invention relates to the technical field of interference sensing, in particular to a sensitivity amplification method, device, equipment and medium based on virtual reference interference. Background technique [0002] Interferometric sensing technology has become one of the most popular technologies to analyze the changes of various signals by measuring the interference spectrum of the signal beam and the reference beam. When the material or structure in the sensing system is changed, the interference spectrum is shifted, so it can be used to measure temperature, strain, refractive index and lateral load, etc. In order to achieve high sensitivity detection, the method of using the vernier effect to amplify the sensitivity is widely used. The vernier effect is realized by two interferometers integrated in the sensing system, one as a reference interferometer (RIM) and the other as a sensing interferometer (SIM). SIM measures a changing signal, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/353
CPCG01D5/35306
Inventor 方晓惠张武林春丽陈圳南黄仕宏鲁敦科万明桂
Owner GUANGZHOU UNIVERSITY
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