Development status and future trend of ultrafast laser

In recent years, with the continuous upgrading of technology and the change of market demand, laser technology has been applied more and more in the fields of consumer electronics, new display, laser internal carving, biological medicine and other fields, and these new requirements have become more demanding on the precision of laser pointerprocessing. Stimulated by the strong market demand, ultra-fast laser technology has made new breakthroughs and quickly become the development direction of the industry.

Ultrafast laser has ultrashort pulse and super characteristic, which can obtain very high peak light intensity at low pulse energy. With the emergence of ultra-short pulse chirp amplification technology, the intensity of ultra-fast laser is rapidly improved, and the spectrum width of laser pulse is much larger. Ultra-fast laser with enhanced performance has a very wide application prospect in new particle accelerator and ultra-fast high-energy X-ray source.

Ultrafast lasers are developing rapidly

Ultrafast lasers are usually referred to as picosecond and femtosecond lasers. The difference between femtosecond and picosecond is only in time dimension, which indicates the pulse width of a laser pulse in unit time. When processing materials, ultra-fast laser can effectively avoid melting and continuous evaporation of materials caused by long pulse width and low intensity laser, which can greatly improve the processing quality.

As early as 1960, the first ruby laser in the world laid the foundation for ultra-fast laser research. In 1961, q-switching technology realized the first short laser pulse output with pulse width of tens of nanoseconds in ruby laser. In the mid-1960s, the development of ruby laser mode-locking and neodymium glass laser mode-locking opened up the study of the phenomenon in picosecond time domain. From the emergence of ruby laser, with the help of important pulse Q switching, mode locking and compression technology, ultra-fast laser experiences and realizes the development process of nanosecond, picosecond, femtosecond and attosecond.

At present, from a global perspective, the main suppliers of picosecond and femtosecond lasers are the large foreign companies of trumpf, coherence and spectral physics. With the rapid popularization of ultra-fast laser in application, more and more domestic companies begin to increase their investment in this field and start to catch up with foreign enterprises, among which dazu, beilin, huari and anyang laser are the most representative manufacturers.