3d crystal laser subsurface engraving machine-532nm green laser Excellent III 532 series green DPSS laser, developed and produced by RFH, covers 18w-35w in laser power with short pulse width (<7-8ns@40K) ,superior beam quality (M²<1.2) and perfect laser spot quality (beam circularity >90%). It is particularly suitable for drilling and scribing in ceramics, marking, cutting and drilling in glass & wafer and surface treatment in most of the metal and non-metal materials.