Home/Technical Glossary/Green Laser Green Laser A green laser is a laser that utilizes a 532nm wavelength in the visible (green) spectrum. This wavelength is better absorbed by highly reflective materials like gold and copper alloys enabling precision micro-welding of parts that cannot be done with a traditional 1064nm YAG laser. For more information, read our blog Green Lasers: the Key to High Volume Micro Welding of Conductive Parts