Tag Archives: diffractive optical elements (DOEs)

Multifocal DOEs Enable Laser Separation of Sapphire Wafers

Researchers at Nanyang Technological University of Singapore successfully demonstrated a multi-foci laser cutting technology for sapphire wafer separation, using Holo/Or multi-focal DOEs. Sapphire wafers are used for manufacturing LEDs. Unlike typical cases where the entire cross-section needs to be scanned with single or multiple passes, this team developed a new separation technique, using only partial thickness scanning, … Continue reading

July 25, 2022 Blog, Holo/Or, Optics

Diffractive Laser Beam Sampler

Laser welding and other types of material processing are very popular applications that utilize the growing industry of high-power lasers. The use of laser beam shaping can assist in optimizing the welding process for maximal throughput and process quality.  However, high quality, high power laser processing requires constant control and metrology to ensure process stability. … Continue reading

July 10, 2022 Blog, Holo/Or, Optics