KTPCrystalKTPCrystalsPotassiumTitanylPhosphate(KTiOPO3orKTP)crystalsarewidelyusedinbothcommercialandmilitarylasersincludinglaboratoryandmedicalsystems,range-finders,lidar,opticalcommunicationandindustrialsystems.KTPisfeaturedby1.Largenonlinearopticalcoefficient2.Wideangularbandwidthandsmallwalk-offangle3.Broadtemperatureandspectralbandwidth4.Highelectro-opticcoefficientandlowdielectricconstant5.Largefigureofmerit6.Nonhydroscopic,chemicallyandmechanicallystableOffers1.Strictqualitycontrol2.largecrystalsizeupto20x20x40mm3andmaximumlengthof60mm;3.Quickdelivery(2weeksforpolishedonly,3weeksforcoated)4.Unbeatablepriceandquantitydiscount5.Technicalsupport6.AR-coating,mountingandre-polishingserviceChemicalandStructuralPropertiesofKTPCrystalOrthorhombic,SpacegroupPna21,PointgroupCrystalStructuremm2.LatticeParametera=6.404Å,b=10.616Å,c=12.814ÅMeltingPoint~1172°CMohsHardness5Density3.01g·cm-3ThermalConductivity13W·m-1·K-1ThermalExpansionαx=11×10-6/K,αy=9×10-6/K,αz=0.6×10-6/KCoefficientOpticalandNonlinearOpticalPropertiesofKTPCrystalthatshighKTPCrystal350nm~4500nmTransparencyRangeThermo-opticCoefficientdnx/dT=6.1×10-6dny/dT=8.3×10-6[K-1](@1064nm)dnz/dT=14.5×10-6AbsorptionCoefficient<0.1%cm-1@1064nm<1%cm-1@532nmForTypeIISHGofTemperatureAcceptance:24°C·cm-1aNd:YAGlaser@1064nmSpectralAcceptance:0.56nm·cm-1AngularAcceptance:14.2mrad·cm-1(φ);55.3mrad·cm-1(θ)Walk-offAngle:0.55°NLOCoefficientsdeff(II)≈(d24-d15)sin2φsin2θ-(d15sin2φ+d24cos2φ)sinθNon-vanishedNLOd31=6.5d24=7.6d32=5pm/Vd15=6.1Susceptibilities[pm/V]d33=13.7SellmeierEquationsnx2=3.0065+0.03901/(λ2-0.04251)-0.01327λ2(λinμm)ny2=3.0333+0.04154/(λ2-0.04547)-0.01408λ2nz2=3.3134+0.05694/(λ2-0.05658)-0.01682λ2ApplicationsforSHGandSFGofNd:lasersKTPisthemostcommonlyusedmaterialforfrequencydoublingofNd:YAGandotherNd-dopedlasers,particularlywhenthepowerdensityisatalowormediumlevel.Todate,extra-andintra-cavityfrequencydoubledNd:lasersusingKTPhavebecomeapreferredpump