Principle and application of laser

Particles in the atoms of some substances are excited by light or electricity, changing from low-energy atoms to high-energy atoms. When the number of high-energy atoms is greater than that of low-energy atoms, and they change from high-energy atoms to low-energy atoms, they emit light with exactly the same phase, frequency and direction. This kind of light is called laser.

Laser is also called "laser". Its full name is "Stimulated Radiation Optical Amplification". 19 17, Einstein put forward the theory of "stimulated emission", in which a photon makes an excited atom emit the same photon base.

1960, Mayman, a researcher at Hughes Aviation Laboratory in California, invented the world's first ruby laser. 196 1 year, the first laser in China was born in Changchun Institute of Optics and Mechanics led by Wang Daheng.

1965 Bell Laboratories invented the first YAG (solid-state) laser.

Laser applications:

Laser technology can be widely used in cutting, welding, drilling, marking, carving, measurement, diagnosis and other fields.

China's industrial upgrading is imminent. The demand for laser technology in micro-welding, precision measurement, biomedical diagnosis, chip manufacturing and other fields is rising, and laser technology has entered a new process of rapid development.

From the development of laser industry, laser technology has been widely used in consumer electronics, 3D printing, semiconductors, new energy, display, biomedicine, laser detection and other fields.