Zinc selenide (ZnSe), is a light yellow binary solid compound. It is an intrinsic semiconductor with a band gap of about 2.7 eV at 25 °C. ZnSe rarely occurs in nature. It is found in the mineral stilleite named after Hans Stille. It is used as an infrared optical material with a remarkably wide transmission wavelength range (0.6 µm to 20 µm). ZnSe is very fragile and breaks easily.
A customer contacted our facility in Lake Mary, Florida to determine if a laser system could cut a ZnSe cylinder. After receiving the samples in house, our application engineers first marked a single line several times over and over (approximately 500 passes) using a pulsed fiber laser (1064nm, 1mJ @ 20kHz) equipped with a 160mm focusing lens at 100% power. But the cut could go only about 1mm deep. After that it did not go any deeper, even if the focal position, marking speed, etc. were changed. Then a 10x1mm solid rectangle was marked over and over, gradually moving cutting head down to keep bottom of the cut in focus. As a result, a 5mm deep cut (wedge shaped) was produced. The top of the cut was larger when compared to the bottom of the cut. Then the rest of material was broken by hand. The entire cycle time was about 30 minutes.
Conclusion: To cut the cylinder in half, it is needed to make a cut of 25mm deep (assuming cylinder will be cut in a rotary chuck). Our Fiber laser can cut this material to the extent of the successful tests performed above. It appears that the use of a high power fiber laser (something like 1kWt) on a cutting machine using a rotary indexer would be needed to accurately process this sample. However this thickness, 25mm, may still be too big for achieving a quality cut. Currently no such machine is available in our lab for further testing this theory.
The Titan Series, the newest edition to Laser Photonics’ product line, is a multipurpose fiber laser cutting machine with a single pallet shuttle table. It is equipped with a high-powered, energy efficient fiber laser and an advanced direct drive motion control platform. Comparable to other laser cutting machine, the Titan has a lighter weight design and the fastest cutting speed on the market for comparable systems.
The SBM1200 FL fiber laser cutting machine is a state of the art design combining the latest development in the motion engineering, PC based CNC controls, and Fiber Laser Material Processing Technologies. Our advanced laser cutting head design is equipped with crash protection, autofocus, and a high pressure cutting head with software selectable, assist gas (CO2 and N2 or Ar).
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