A system device for direct imaging of stimulated Brillouin scattering transient grating structure
A technology of stimulated Brillouin and grating structure, applied in the direction of reflectometer using stimulated backscattering, testing of machine/structural components, measuring device, etc., can solve the problem of few reports, unexplainable experimental results, microscopic mechanism and structural lack of detection methods etc.
Inactive Publication Date: 2020-09-11
NANCHANG HANGKONG UNIVERSITY
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[0002] Stimulated Brillouin scattering has broad application prospects in the field of underwater detection and remote sensing, but there are not many reports on its mechanism of action, and many experimental results cannot be explained
At present, the research on the physical mechanism of stimulated Brillouin scattering basically revolves around solving the numerical solution of the simplified nonlinear coupled wave equations to analyze and explain some basic laws, but lacks the microscopic mechanism and structure existing in the scattering process. Corresponding detection method
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[0015] The implementation of the present invention will be described in detail below with reference to the drawings and examples, so as to fully understand and implement the implementation process of how to use technical means to solve technical problems and achieve technical effects in the present invention.
[0016] The specific embodiment of the present invention is such as figure 1 As shown, a system device for directly imaging a stimulated Brillouin scattering transient grating structure, including a horizontally polarized light emitting system, a λ / 4 wave plate 04, a mirror 05, and a stimulated Brillouin scattering transient grating forming system, optical energy meter 08 and optical parametric amplification imaging optical path system;
[0017] The horizontally polarized light emission system emits horizontally polarized light, and the horizontally polarized light rotates 45 degrees after passing through the λ / 4 wave plate, and then enters the stimulated Brillouin scatt...
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Abstract
The invention discloses a system device for directly imaging a stimulated Brillouin scattering transient grating structure, including a horizontally polarized light emitting system, a λ / 4 wave plate, a reflection mirror 1, and a stimulated Brillouin scattering transient grating forming system , optical energy meter and optical parametric amplification imaging optical path system, the present invention uses optical parametric amplification imaging technology to directly detect the stimulated Brillouin scattering transient grating in water, and focuses on detecting the distribution of refractive index modulation of water after stimulated Brillouin scattering occurs in water And ultrasonic grating non-uniform distribution, verify the accuracy of the existing stimulated Brillouin scattering transient grating model. The stimulated Brillouin scattering transient grating structure is detected by the femtosecond time resolution imaging system, and the stimulated Brillouin scattering transient ultrasonic grating structure image is obtained, and an accurate grating structure model is obtained through further analysis.
Description
technical field [0001] The invention relates to a method for detecting a transient grating structure, in particular to a system device for directly imaging a stimulated Brillouin scattering transient grating structure. Background technique [0002] Stimulated Brillouin scattering has broad application prospects in the field of underwater detection and remote sensing, but there are not many reports on its mechanism of action, and many experimental results cannot be explained. At present, the research on the physical mechanism of stimulated Brillouin scattering basically revolves around solving the numerical solution of the simplified nonlinear coupled wave equations to analyze and explain some basic laws, but lacks the microscopic mechanism and structure existing in the scattering process. corresponding detection method. Contents of the invention [0003] The problem to be solved by the present invention is to provide a system device for directly imaging the stimulated Bri...
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IPC IPC(8): G01M11/00
CPCG01M11/319
Inventor 史久林袁大鹏刘严欢刘哲朱羿叡罗宁宁张余宝谢成峰何兴道
Owner NANCHANG HANGKONG UNIVERSITY