Transparent material processing involves drilling, cutting or engraving transparent materials such as glass, sapphire or diamond. Due to their brittleness and hardness, these materials are difficult to machine with conventional wearing tools.
Lasers can be used to process transparent materials even though they do not absorb the laser wavelength. Indeed, lasers can generate extremely high peak powers which can trigger a non-linear absorption effect leading to material vaporization. The phenomenon is so intense and brief that only the irradiated volume is affected. The result is a clean ablated material with minimal debris and, most importantly, no tool wear. The beam intensity profile influences the efficiency of these phenomena and it is effectively modified using CANUNDA-PULSE.
A precisely shaped laser beam improves:
Quality: The laser-matter interaction process is locally optimized and most of the laser pulse energy serves the etching process. The result is sharper and produces less debris thus reducing the chipping risk.
Speed: the processing speed increases with the process efficiency. For the same power, a shaped laser beam is more efficient. Therefore, higher repetition rates can be achieved, increasing linear speeds.
The following transparent material applications can benefit from laser beam shaping: