YvO4 lasers offer a smaller beam diameter and spot size which means that the higher peak powers of the laser is more concentrated at the point of impact and results in ultra-high resolution and crisper, clearer marks as compared to other fiber lasers. They are best for performing fine marks, heat-sensitive materials (metal, foils, silicon, plastics, etc.) and applications where high consistency is required. MOPA lasers are suited for marking natural and colored anodized aluminum to create black markings without damaging the surface. They are also used for high-contrast marking of various other metals (e.g. nickel alloys, steels, titanium). For example, a MOPA laser creates a wide range of reproducible annealing colors on stainless steel.