IdealPhotonics' newly introduced nonlinear crystals are a class of optical materials with non-centrosymmetric structures. Their core characteristic is the ability to generate nonlinear polarization effects under strong light fields (such as lasers), enabling active control of light wave frequency, phase, or polarization state.Through the strong nonlinear optical effects generated by the non-centrosymmetric lattice structure, they achieve light wave frequency conversion (such as frequency doubling/sum frequency), parametric oscillation, and phase-matching control under strong light fields, combining a high nonlinear coefficient with a wide transmission range.