Gaussian light comprehensive experiment teaching system and experiment method thereof

Abstract

The invention discloses a Gaussian light comprehensive experiment teaching system and an experiment method thereof. The system comprises a Gaussian mode generation module I, a mode mutual conversion module II and a mode acquisition module III. The Gaussian mode generation module I comprises a laser, an attenuation sheet, a beam expanding system, a non-polarization beam splitter and the like; the mode mutual conversion module II comprises an integrated Gaussian light mode converter and the like; the mode acquisition module III is a charge-coupled device image sensor; the laser is used for generating fundamental mode Gaussian light, then the light intensity is weakened by an attenuation sheet, the size of a light spot is increased by the beam expanding system, the polarization component of the light beam is adjusted by a half-wave plate, and the light beam can uniformly and vertically enters a spatial light modulator after passing through a non-polarization beam splitter, finally the selected first-stage diffracted light is a finally generated Gaussian mode after passing through an optical 4F system combined with a small hole; after being reflected by the reflector, the first-stage diffraction light sequentially passes through the adjusting lens and the integrated Gaussian light mode converter 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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Problems solved by technology

[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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