Nonlinear crystals with anti-reflective coatings on both sides are essential for enhancing laser efficiency in frequency conversion and optical parametric oscillation applications. These crystals exhibit exceptional surface quality with scratch-dig specifications ranging from 20-10 to 10-5, ensuring minimal scattering and high optical clarity. Leading suppliers like CRYSTECH Inc. and DIEN TECH provide a diverse selection of crystals such as BBO, KTP, and LiNbO3 to meet various phase-matching and flatness requirements. On FindLight, buyers can compare detailed specifications, request pricing, and connect directly with manufacturers, all without the need for registration.