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2023-01-03

low power laser light sourceIt is an electric light source that uses excited particles to emit light under the action of excited radiation, and is a coherent light source. Since 1960, the United States made a ruby laser, laser light source has hundreds of, the output wavelength from short-wavelength ultraviolet to far infrared. Low-power laser sources can be divided into four categories according to their working substances (also known as active substances): gas laser sources (including atoms, ions, molecules and excimer), solid laser sources (crystals and neodymium glass), liquid laser sources (including organic dyes, inorganic liquids and chelates) and semiconductor laser sources.

low power laser light sourceIt consists of three parts: working substance, pump excitation source and resonant cavity. The particles (molecules, atoms or ions) in the working material are excited to a high-level excited state under the action of the pump excitation source, so that the number of particles in the high-level excited state exceeds the number of particles in the low-level excited state, that is, the formation of particle number inversion. When a particle jumps from a high energy level to a low energy level, a photon is produced. If the photon returns to the working substance under the action of the resonant cavity mirror and induces the transition of the same nature, the radiation with the same frequency, direction and phase will be produced. In this way, the feedback and amplification of the resonant cavity are continuously circulated, oscillating back and forth, and the radiation is continuously enhanced, and then a powerful laser beam output is formed.

Low power laser light source has the following characteristics: 1, good monochromato. The color of the laser is very pure, and the monochromativity is more than 10 times higher than that of the ordinary light source. Therefore, the laser light source can be widely used in optical communication and is an excellent coherent light source. 2, strong direction. The divergence solid angle of the laser beam is very small, which is 2 to 3 orders of magnitude smaller than the divergence angle of ordinary light or microwave, and is on the order of milliradians. 3. High brightness. The main advantages of the laser light source are high brightness, good color, low energy consumption, long life, small size, and the radiation brightness at the laser focus is 10 to 100 times higher than that of ordinary light. At the same time, the laser is the only light source with five advantages, and the LED light source is also very powerful, but it is difficult to break through the brightness, so it will never be at the same level as the laser light source. Of course, these advantages cannot be fully demonstrated at present, and the cost of laser light sources is high. Especially when realizing color display, the problem that the brightness and life of the green light source do not match the red and blue is also plaguing this industry.

low power laser light sourceApplication: Low-power laser light sources are widely used in various fields of science and technology, industrial and agricultural production, such as laser processing (cutting, welding, drilling, heat treatment, marking), isotope separation, nuclear fusion, medical instruments (scalpel, coagulator), Optical fiber communication light source, detector, stage art light source, holographic light source, laser fax, laser video, laser typesetting printing, optical computer, laser weapon.

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