We supply high quality Q-switch crystals such as DKDP (KD*P), KDP, BBO, LiNbO3 / MgO:LiNbO3, Cr4+:YAG and KTP, etc. and finished components with low competitive price. When an electric field is applied to an electro-optic (E-O) crystal, the refractive index of E-O crystal will change linearly to electric field. The phenomenon is called linear electro-optic effect. If a linearly polarized light passes through an E-O crystal, the phase retardation will be induced. It is clear that the phase of light will change together with electric field (E). This is called electro-optic phase modulation. If two crossed polarizers are placed at input and output ends of E-O crystal separately, the intensity or amplitude of light can also be modulated by electric field. This is called amplitude modulation. There are two kinds of E-O modulations. One is longitudinal E-O modulation if the directions of electric field and light propagation are the same. The KDP isomorphic crystals are normally used in this scheme. If the directions of electric field and light propagation are perpendicular, it is called transverse E-O modulation. The LiNbO3, MgO:LiNbO3, BBO and KTP crystals are usually employed in this scheme. We supply high quality Q-switch crystals in large quantities for these applications. Our engineers will also serve you to select and design the best crystal, according to the laser parameters you provided. Our Capabilities: Dimension Tolerance: (W±0.1mm) x (H±0.1mm) x (L+0.1/-0.1mm) (L<2.5mm) Clear Aperture: central 90% or the diameter, No visible scattering paths or centers when inspected by a 50mW green laser Flatness: less than λ/8 @ 633nm Transmitting Wavefront Distortion: less than λ/8 @ 633nm Chamfer: ≤0.2mmx45° Chip: ≤0.1mm Scratch/Dig Code: better than 10/5 to MIL-PRF-13830B Parallelism: ≤20 arc seconds Perpendicularity: ≤5 arc minutes Angle Tolerance: Δθ≤0.25°, Δφ≤0.25° Damage threshold[GW/cm2]: >1 for 1064nm,TEM00, 10ns, 10HZ (polished only); >0.5 for 1064nm,TEM00, 10ns, 10HZ(AR-coated) ; >0.3 for 532nm,TEM00, 10ns, 10HZ(AR-coatd). Quality Warranty Period: one year under proper use.