Basic parameter Chemical Formula KD2P Curie temperature 222K Symmetry 42m Density 2.355g/cm3 Absorption 0.005/cm Extinction ratio 1:10000 Deuterium ratio 98.05%--99.05% Transmission band 200-1600nm Non-linear coefficient d36=0.40pm/v Longitudinal half-wave voltage 2.98KV(I=546nm) Electric resistance >2x109ª+¿Mcm Electric-optical coefficient r41=8.8pm/v,r63=25pm/v . Application Designation Operation Input Output 53.7 íp SHG (II) 1064 nm 532 nm 59.5íp THG (II) 1064 nm + 532 nm 355 nm 63.7íp SFM (II) 1064 nm + (421-1000 nm) 302-515 nm 86íp FHG (I) angle tune 532 nm 266nm 90íp FHG (I) temp. tune 532 nm 266 nm 36.6íp SHG (I) 1064 nm 532 nm 46.8íp THG(I) 1064 nm + 532 nm, 355 nm . Specifications Wavefront distortion: less than l/8 633nm Dimension tolerance: (W 0.1mm) x (H 0.1mm) x (L + 0.2mm/-0.1mm) Clear aperture: > 90% central area Flatness: l/8 633nm Scratch/Dig code: 10/5 to MIL-O-13830A Parallelism: better than 20 arc seconds Perpendicularity: 5 arc minutes Angle tolerance: qD 0.3, fD 0.3 Quality Warranty Period: one year under proper use .