Demonstration method and device for white laser generation principle

Abstract

The invention provides a demonstration method and device for the white laser generation principle and belongs to the field of teaching experiment instruments. Red laser and green laser are combined into a path of laser beam through a first dichroscope and the laser beam and blue laser are combined into a path of laser beam through a second dichroscope; white laser is obtained by adjusting the intensity proportions of the red laser, the green laser and the blue laser. The demonstration device has the advantages that the intensity proportions of the red laser, the green laser and the blue laser can be changed by rotating polarizing films and thus the white laser can be obtained. With the device, the forming principle of white laser can be demonstrated intuitively; the experimental phenomenon of colorimetry that different red, green and blue ratios correspond to different colors can be intuitively demonstrated by rotating the polarizing films, so that the effect is remarkable and the teaching content is better enriched.

Description

technical field [0001] The invention relates to a demonstration method and a device for the principle of white laser generation, and belongs to the technical field of teaching experiment instruments. Background technique [0002] Combining red, green and blue laser beams with high precision in a certain intensity ratio can produce white laser light. In 2015, researchers at Arizona State University in the United States developed a nanoscale semiconductor material sheet composed of a semiconductor alloy of zinc, cadmium, sulfur, and selenium. Different parts of it generate laser light of different colors when excited by light pulses. Part of it produces red laser light, the part rich in cadmium and sulfur produces green light, and the part rich in zinc and sulfur produces blue light, thus realizing the high-precision combination of three-color laser beams and producing white laser light, which can be widely used in lighting and optical communication fields . In the universit...

AI Technical Summary

Problems solved by technology

In the university course "Laser Principles" and other related teaching processes, language descriptions and diagrams are usually used to impart knowledge to students. Students cannot intuitively observe the process of combining and forming white laser beams, and cannot practice different laser intensity ratios. The experiment of producing lasers of different colors is even more difficult for liberal arts students to understand. If a teaching instrument can be developed, it can intuitively simulate the formation process and principle of white lasers, and at the same time enable students to practice the experiment of different laser intensity ratios corresponding to different colors of lasers , it will be a very beneficial supplement and assistance to the teaching content and means

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