Optical Quantum Generator - "Laser" in medicine

The unique properties of laser radiation have made it possible to use them in various fields of science and technology, as well as in everyday life. There are different types of lasers. There is a difference between the environment in which the inversion takes place (active environment - gas, solid body, semiconductors) and the method by which the inverted environment is created (pumped). The present paper discusses the existing materials around this issue and focuses on safety issues when used for medical purposes.