A Gaussian light comprehensive experimental teaching system and its experimental method
A teaching system, the technology of Gaussian light, applied in the field of Gaussian light comprehensive experimental teaching system, can solve the problems such as not involving two Gaussian modes, and achieve the effect of simple and clear steps, few steps, and accurate experimental conclusions
Active Publication Date: 2021-05-28
XI AN JIAOTONG UNIV
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[0004] However, the contents mentioned above are the basic contents in Gaussian light experiment teaching, which can enable students to have a certain understanding of its basic properties, and do not involve the two Gaussian modes that have been widely studied in practical applications. Laguerre- Gaussian and Hermitian-Gaussian
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[0036] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0037] Such as figure 1 As shown, a Gaussian light comprehensive experiment teaching system provided by the present invention is composed of three modules: Gaussian mode generation module I, mode mutual conversion module II and mode acquisition module III.
[0038] Among them, the Gaussian mode generation module I consists of a laser, an attenuation plate 2, a beam expander system 3, a half-wave plate 4, a non-polarizing beam splitter 5, a spatial light modulator 6, an optical 4F system 7 and a pinhole 8. The laser generates fundamental mode Gaussian light 1, the light intensity is reduced by the attenuator 2, and then the beam expander system 3 is used to increase the spot size, and then the polarization component of the beam is adjusted by the half-wave plate 4, and after passing through the non-polarizing beam splitter 5, it is uniform and vertical...
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The invention discloses a Gaussian light comprehensive experiment teaching system and its experimental method. The system includes a Gaussian mode generation module I, a mode mutual conversion module II and a mode acquisition module III; the Gaussian mode generation module I includes a laser, an attenuator, and a beam expander. system, non-polarizing beam splitter, etc.; the mode conversion module II includes an integrated Gaussian light mode converter, etc.; the mode acquisition module III is a charge-coupled device image sensor; the laser is used to generate fundamental mode Gaussian light, and the light intensity is reduced by the attenuation sheet , then use the beam expander system to increase the spot size, then adjust the polarization component of the beam through a half-wave plate, pass through a non-polarizing beam splitter and then uniformly and vertically incident on the spatial light modulator, and then pass through an optical 4F system combined with a small hole to select The first-order diffracted light is the final Gaussian mode; after the first-order diffracted light is reflected by the mirror, it passes through the adjusting lens and the integrated Gaussian light mode converter in turn, and finally enters the charge-coupled device image sensor.
Description
technical field [0001] The invention belongs to the technical field of optical experiment teaching, and in particular relates to a Gaussian light comprehensive experiment teaching system and an experiment method thereof. Background technique [0002] Gaussian light is an electromagnetic beam whose transverse electric field and irradiance distribution approximately satisfy a Gaussian function. It has received extensive attention and research in the field of optics. Among them, the Hermite-Gaussian mode and the Laguerre-Gaussian mode are the two most commonly used Gaussian modes. . At the same time, Gaussian light can better describe the characteristics of fundamental-mode laser beams in confined stable cavities. It is of great significance to study Gaussian light as the basis for studying other types of laser beams. [0003] At present, the existing experimental teaching system for Gaussian light mainly includes the measurement and exploration of the characteristics of the G...
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IPC IPC(8): G09B23/22
CPCG09B23/22
Inventor 童童张沛贾俊亮刘青张俊武高博
Owner XI AN JIAOTONG UNIV