Spectral data processing method and system against amplitude noise in weak measurement

A technology of spectral data and processing method, which is applied in the field of spectral data processing and system against amplitude noise in weak measurement, which can solve the problems of sensitivity disappearance and increase the difficulty of reading spectral information, so as to achieve robustness improvement and reduce implementation Effects of Difficulty and Flexible Compensation

Active Publication Date: 2021-08-20
SHANGHAI JIAOTONG UNIV
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  • Application Information

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Problems solved by technology

However, in previous weak measurement technology schemes, the amplitude noise will significantly change the shape of the output spectrum, which greatly increases the difficulty of reading spectral information, and even leads to the loss of sensitivity in severe cases.

Method used

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  • Spectral data processing method and system against amplitude noise in weak measurement
  • Spectral data processing method and system against amplitude noise in weak measurement
  • Spectral data processing method and system against amplitude noise in weak measurement

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Embodiment 1

[0064] According to a kind of spectral data processing method against amplitude noise in weak measurement provided by the present invention, comprising:

[0065] Noise characteristic extraction step: performing domain transformation on the measured output spectrum and input spectrum to obtain parameters expressing amplitude-type noise characteristics in the transformation domain;

[0066] Filter design step: design a filter according to the input spectrum and the extracted noise characteristic parameters, combined with the selection of processing requirements;

[0067] Spectral data filtering step: use the designed filter to filter and verify the spectral data to obtain the noise-reduced spectrum;

[0068] The step of calculating the weak measurement result: using the spectrum after the noise weakening, the estimated value of the parameter to be measured by the weak measurement is obtained through the spectral analysis and calculation of the weak measurement system;

[0069] ...

Embodiment 2

[0114] Embodiment 2 is a modification of embodiment 1

[0115] The invention provides a spectral data processing method for reducing specific amplitude noise. The invention adopts the technique of analyzing and processing the spectral data in the transformation domain, which can realize the attenuation of the specific amplitude noise.

[0116] In this embodiment, the spectral data processing method provided by the present invention, such as figure 1 As shown, it includes: joint bias weak measurement module, noise characteristic extraction module, filter design module, and spectral data filtering module.

[0117] Such as figure 2 Shown is the frame diagram of this example, which includes 1 wide-spectrum light source, 2 combined bias weak measurement system, 3 spectrum analyzer, 4 noise characteristic extraction module, 5 filter design module, 6 spectral data filtering module, 7 weak Measurement result calculation module.

[0118] First, the output light is formed by a weak...

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Abstract

The present invention provides a spectral data processing method and system against amplitude-type noise in weak measurement, including: noise characteristic extraction step: performing domain transformation on the measured output spectrum and input spectrum to obtain amplitude-type noise expressed in the transformation domain Characteristic parameters; filter design step: according to the input spectrum and extracted noise characteristic parameters, combined with the selection of processing requirements to design the filter; spectral data filtering step: use the designed filter to filter and verify the spectral data to obtain the noise The weakened spectrum; the step of calculating the weak measurement result: using the spectrum after the noise weakening, the estimated value of the parameter to be measured by the weak measurement is obtained through the spectral analysis and calculation of the weak measurement system; It overcomes the adverse effects of amplitude noise on weak measurement techniques.

Description

technical field [0001] The present invention relates to a technology for reducing noise in weak measurement technology, in particular, to a spectral data processing method and system for resisting amplitude noise in weak measurement, and more specifically, to a method for reducing noise during weak measurement. Spectral data processing methods affected by amplitude-type noise. Background technique [0002] Weak measurement technique is a concept in quantum measurement. Weak measurement technology performs strong measurement after the system evolves, and projects the state of the system onto some desired state, so as to have only a weak impact on the original system. Weak measurement techniques can obtain a result outside the eigenvalue of the operator under test at the cost of discarding a large number of measurement results, that is, multiple measurements, and this result can deviate greatly from the eigenvalue of the operator under test. For precision measurement, this m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/28
CPCG01J3/28
Inventor 黄靖正黄朝政李洪婧曾贵华
Owner SHANGHAI JIAOTONG UNIV
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