High-power fiber lasers due to the small diameter and high power are capable of cutting and drilling various types of metal sheets with high thickness and due to the small diameter of the laser beam, they have a great deal of elegance and accuracy compared to other cutting and drilling methods; so today, in most large industries, laser cutting and laser drilling systems are replacing old methods. In addition to the typical properties of fiber lasers, pulsed lasers can produce very high levels of power at a very small average power due to their very small energy distribution. Therefore, it has very important applications in cases requiring high accuracy and elegance, such as engraving, surgery, and so on.
These types of lasers have all fiber-optic components which substitute separate and segregated electro optic components and therefore occupy less space and volume. These properties, along with light propagating in fiber optic, causing easy and flexible usage and make it an excellent option for precise surgery, peeling, tissue restoration, and more. These lasers are also used as light sources in medical diagnostic devices, spectroscopy, test and measurement devices, and so on.
Laser engraving machines on the market utilize a variety of laser sources, but mostly these are sources of CO2 lasers and fiber lasers. Each type of lasers has its own advantages and disadvantages and is suitable for use in certain materials. CO2 lasers use carbon dioxide gas as a laser active medium. These lasers generate 10600 nm by using electric excitement and according to its intensity and wavelength, it is suitable for non-metallic surfaces, especially plastic, wood and leather surfaces. But fiber lasers can be used for a variety of metal and non-metal surfaces due to their wavelength of 1064 nm, because most materials have most absorption in this wavelength. also, due to the much smaller beam diameter compared to the CO2 laser, they can produce an intensity equal to one hundred times the intensity produced by a CO2 laser with the same average power and so they increase the speed and precision compared to CO2 laser. Also, the intensity increases the contrast of the image, and since the performance of the engraving machine is based on intensity levels therefore, the higher laser source’s intensity, causing greater contrast, or better image quality. Fiber lasers are much easier to use and maintain compared to the CO2 laser. As well as the life time of fiber lasers is 25,000 hours compared with the life time of CO2 lasers for 4000 hours, it is more cost effective. In the price range while fiber lasers are the same with CO2, fiber maintenance and repair costs are much lower than of CO2 lasers. and practically with the advent of fiber lasers in the industry, it can be said that CO2 lasers have actually been replaced by fiber lasers.
Laser cutting machines and applications provided by them can greatly meet the needs of the industry Therefore, different laser cutting machines have been produced commensurate with the development of industries. with the growth of fiber laser technology, the use of laser cutting machines has increased too. Fiber laser cutting machines are popular all over the world. The high cutting speed and precision of these devices Has caused them to spread among various industries. These machines are used to cut different types of metals such as stainless steel, carbon sheet, iron, aluminum, copper, aluminum alloys, titanium alloys, galvanized sheets, manganese steel and electrolytes.