What are the advantages of ultrafast lasers?
What is an ultrafast laser?
To understand ultrafast lasers, we must first know what laser pulses are. A laser pulse refers to a light pulse emitted by a laser working in a pulsed manner. In simple terms, it is the same as a flashlight. If you keep the switch on, the flashlight works continuously. If you turn on the switch and close it immediately, it is equivalent to emitting a light. pulse.
Laser pulses can be very short, such as nanoseconds, picoseconds, femtoseconds, such as picoseconds, one trillion can be emitted within 1 second Ultrashort pulses are ultrafast lasers.
What are the benefits of ultrafast lasers?
When the laser energy is concentrated in such a short time, huge single pulse energy and extremely high peak power will be obtained. When processing materials, long pulse width and low pulse width will be avoided to a large extent. The intense laser causes the material to melt and evaporate continuously, which can greatly improve the processing quality.
In industry, there are usually four types of laser atmosphere: continuous wave, quasi-continuous, short pulse, and ultrashort pulse. Among them, continuous wave lasers are widely used in laser cutting, laser welding, laser cladding and other processing fields; quasi continuous wave is very effective for laser drilling and heat treatment; short pulses are widely used in laser marking, drilling, medical treatment, and laser ranging , The second harmonic generation and military application, etc. Ultrashort pulses are one step closer, and are widely used in precision machining, scientific research, medical, military and other fields.
The interaction time between the ultra-short laser and the material is very short, and it will not bring heat influence to the surrounding materials, so ultra-fast laser processing is also called cold processing. Ultrafast lasers can process almost all materials, including metals, semiconductors, diamonds, sapphire, ceramics, polymers, composite materials, resins, photoresist materials, films, glass, solar cells, etc.
As the demand for high-end manufacturing, intelligent manufacturing, and high-precision manufacturing continues to increase, ultra-fast laser processing technology will usher in new development opportunities.