Feature and application of femtosecond laser

Features of Femtosecond Laser

1. Femtosecond laser is the shortest pulse that we humans can obtain under experimental conditions, and its accuracy is ± 5 microns;

2 . Femtosecond laser has a very high instantaneous power, its instantaneous power can reach one trillion watts, which is hundreds of times more than the current total power generation in the world;

3. Femtosecond laser has Accurate target focusing and positioning feature, can focus to ultra-fine space area much smaller than the diameter of the hair;

4. Substances will produce very strange phenomena under the action of femtosecond laser. Gaseous matter, liquid matter, and solid matter will instantly become plasma;

5. Use femtosecond laser for surgery without thermal effects and shock waves, and there will be no tissue damage in the entire optical path .

Femtosecond laser application

The main application of femtosecond laser can be summarized into three aspects, namely, the application of femtosecond laser in the ultrafast field, The application in the super field and the application in the ultra-fine processing.

The femtosecond laser plays a role in rapid process diagnosis in the field of ultrafast phenomena research. Femtosecond laser is like an extremely fine clock and a super-high-speed 'camera' that can analyze and record some rapid processes in nature, especially at the atomic and molecular level.

The application of femtosecond lasers in the super-intensity field (also known as strong field physics) is due to the fact that the peak power and light intensity of femtosecond pulses with certain energy can be very high. The electromagnetic field corresponding to such a strong light will be much larger than the Coulomb field in the atom, so that all the electrons in the atom are easily stripped out. Therefore, the femtosecond laser is an important tool for studying high-order nonlinear and multiphoton processes in atomic and molecular systems. The energy density corresponding to the femtosecond laser can only exist in a nuclear explosion. Femtosecond intense light can be used to generate coherent X-rays and other extremely short-wavelength light, which can be used for controlled nuclear fusion research.

The use of femtosecond lasers for ultra-fine processing is another important application research field of femtosecond laser technology besides the use of femtosecond lasers for ultrafast phenomenon research and super-strong phenomenon research. This application has only been developed in recent years, and there have been many important developments. Different from femtosecond ultrafast and femtosecond super research, femtosecond laser ultrafine processing is closely related to advanced manufacturing technology, which can play a more direct role in promoting the development of certain key industrial production technologies.