What are the three main areas in which femtosecond lasers are used?

Since its invention, the laser has been widely used in different fields such as processing and manufacturing, testing, medical treatment and so on, by virtue of its monochromaticity, good directionality, concentrated energy and many other advantages. In recent years, scientists have discovered a more peculiar laser - femtosecond laser. Femtosecond laser in a moment announced the power than the world's total power of electricity generation, scientists guess that the femtosecond laser will play an important role in the field of new energy in the next century.

Ultra-fast and ultra-strong laser primary femtosecond laser as the core of the research and application, as a common scientific research things and methods, the use of femtosecond laser can be largely summarised as three major aspects, namely, the use of femtosecond laser in the field of ultra-fast, ultra-strong in the field of the use of ultra-fine and precision machining in the use of ultra-fine.

(1) Ultra-fast phenomenon refers to the physical, chemical or biological processes that produce rapid changes in the microscopic system of matter. Femtosecond laser in the field of ultrafast phenomenon research plays a rapid process diagnosis effect. Femtosecond laser is like an extremely precise clock and an ultra-high-speed "camera", which can analyse and record some rapid processes in the natural world, especially at the atomic and molecular levels. In this field, femtosecond laser opens a new door for us, allowing us to see the more subtle natural world.

(2) The use of femtosecond lasers in the field of ultra-intensity (also known as strong-field physics) is attributed to the fact that the peak power and intensity of femtosecond pulses with a certain energy can be very high. The electromagnetic field corresponding to such intense light will be much larger than the Coulomb field in the atom, and then it is easy to drop the electrons in the atom through and through. Thus, femtosecond laser is an important thing to study the high-order nonlinear, multi-photon processes in atomic and molecular systems. Energy densities corresponding to femtosecond lasers may only exist in nuclear explosions. Femtosecond intense light can be used to generate coherent X-rays and other very short wavelengths of light, can be used for controlled nuclear fusion research.

(3) with the increasing planning of integrated circuits, electronic components in the scale becomes smaller and smaller, the demand for ultra-fine processing technology to provide space to play. Femtosecond laser for ultra-fine processing is a femtosecond laser for ultra-fast phenomena and ultra-strong phenomena in addition to another important application of femtosecond laser technology research areas. This application is in recent years to adapt to the market demand and the initial gradual development, has now made a lot of important development.

With femtosecond ultra-fast and femtosecond ultra-strong research is different from the femtosecond laser ultra-fine processing and advanced manufacturing technology is closely related to the development of certain key industrial production technology can play a more direct role in promoting the effect. Femtosecond laser ultrafine processing is now the world's laser, optoelectronics industry in an extremely well-known cutting-edge research direction. Following the continuous development of femtosecond laser technology, as well as the continuous expansion of the field of application, femtosecond laser will certainly have more applications.