Laser transverse mode demonstration system based on cateye cavity lens loss regulating
A demonstration system, cat's eye technology, used in teaching models, educational appliances, instruments, etc.
Inactive Publication Date: 2009-12-16
TSINGHUA UNIV
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But for the laser transverse mode, there is still no complete experimental system that can realize the colorful observation and analysis of the laser transverse mode.
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[0019] The invention is a novel laser transverse mode observer, figure 1 It is a schematic diagram of the laser transverse mode demonstration system based on the loss adjustment of the cat's-eye cavity mirror. The resonant cavity of the Ne laser is composed of 5 concave mirrors and a cat's-eye inverter composed of 1-1 and 1-2. The cat's eye reverser is composed of 1-1 concave mirror and 1-2 convex lens. The 1-1 concave mirror is placed in the clamping mechanism. The clamping mechanism is composed of 18 concave mirror grooves and 19 concave mirror end caps. The concave mirror clamping mechanism composed of 18 and 19 is fixed on the 17 two-dimensional lens holder, and the two-dimensional lens holder is fixed on the 14 two-dimensional workbench through the 16 helical rod and the 15 helical sleeve. The height adjustment device of the spiral rod sleeve composed of 15 and 16 can realize the height adjustment of the concave mirror, and the two-dimensional lens holder 17 can realize ...
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The invention relates to a laser transverse mode demonstration system based on loss regulation of a cat's-eye cavity mirror, which belongs to the technical field of he-neon laser experiment equipment. Computer, CCD image acquisition system, semi-external cavity He-Ne laser tube, convex lens and its clamping adjustment device, concave mirror and its clamping adjustment device; convex lens and its clamping adjustment device, concave mirror and its clamping adjustment The focal length of the convex lens in the device is equal to the radius of curvature of the concave mirror, and equal to the distance between the two devices to form a cat's eye reverser; the CCD image acquisition system collects the laser beam transverse mode pattern, which is input into the computer through the video line, and is collected by the image in the computer. The image is captured by the card, displayed and stored on a computer. The invention adjusts the loss ratio of the resonant cavity of the laser through a cat's-eye inverter composed of discrete components, thereby controlling the output state of the laser transverse mode. Transverse mode systems have not yet been observed. By using (adjusting) the present invention, it is very convenient to observe the transverse modes of each order, which is beneficial for analysis and understanding.
Description
technical field [0001] The invention relates to a laser transverse mode demonstration system based on loss adjustment of a cat's-eye cavity mirror, and belongs to the technical field of he-neon laser experiment devices. Background technique [0002] Compared with general light sources, laser has the advantage of good monochromaticity, that is, the spectral line width is very small. Such a narrow spectral linewidth is the result of the combined action and mutual interference of various mechanisms such as the resonator after the stimulated radiation of atoms, and finally forms one or more stable and fine spectral lines, which are the modes of the laser. Each laser mode corresponds to a stable electromagnetic field distribution with a certain optical frequency. Analyze the laser mode from two angles parallel to the light output direction (longitudinal) and perpendicular (transverse), and the laser mode can be called longitudinal mode and transverse mode, respectively. [0003...
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IPC IPC(8): G09B23/22
Inventor 张书练周鲁飞任成
Owner TSINGHUA UNIV