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        HOME >PRODUCT DISPLAY >PRODUCT DETAIL
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        KTP crystal
            KTiOPO4 (KTP) is an excellent nonlinear optical material and has been extensively used in frequency doubling of IR lasers. . It has high nonlinear coefficient and stable physical property. Its most popular application is as a frequency doubler utilizing the 1064nm output of a Nd:YAG laser and to generate 532nm laser. KTP’s properties also make it superior for electro-optic modulation, optical parametric generation.
        • DETAIL
        • STANDARD PRODUCT
        • BASIC PROPERTIES
        • Applications:

              ● Frequency Doubling (SHG) of Nd-doped Lasers for Green/Red Light Generation.

              ● Frequency Mixing (SFM) of Nd Laser and Diode Laser for Blue Light Generation.

              ● Parametric Sources (OPG, OPA and OPO)for 0.6um-4.5um Tunable output.

              ● E-O Modulators, Optical Switches, Directional Couplers.

              ● Optical Waveguides for Integrated NLO and E-O Devices, etc.

              ● PPKTP for device engineering etc.

           

          CRYSTIK‘s KTP is featured by:

              ● Large nonlinear optical coefficient;
              ● Wide angular bandwidth and small walk-off angle;

              ● Broad temperature and spectral bandwidth;
              ● High electro-optic coefficient and low dielectric constant;

              ● Large figure of merit; 

              ● Nonhydroscopic, chemically and mechanically stable.

           

          CRYSTIK offers:

               ● Technical support;

               ● Strict quality control;
               ● Large crystal size up to 20x20x40mm3 and maximum length of 60mm;
               ● Quick delivery (2 weeks for polished only, 3 weeks for coated);
               ● Unbeatable price and quantity discount;

               ● AR-coating, mounting and re-polishing service.



        • Dimension Tolerance

          W(+/-0.1)*H(+/-0.1)*L(+0.5/-0.1)mm

          Angle Tolerance

          +/-0.25°

          Perpendicularity

          ≤10′

          Scratch/Dig

          10/5

          Chamfer

          ≤0.2mmx45°

          Parallelism

          ≤10″

          Chips

          ≤0.1mm

          Flatness

          [email protected]

          Clear Aperture

          ≥90%

          Wavefront distortion

          [email protected]

           

          Coatings

          [email protected](R<0.2%)&532(R<0.5%)

          [email protected](R>99.8%)&[email protected](T>95%)

          [email protected](R<0.2%)&1570(R<0.5%)

          [email protected](R>99.8%)&[email protected](T>99.5%)

          [email protected](R>99.8%)&[email protected](R=50,60,70%+/-2%)

          Damage Threshold

          500MW/cm2 (1064nm, 10ns, 10Hz)


        • KTP is a positive biaxial crystal, with the principal axes X, Y, and Z (nz>ny>nx) parallel to the crystallographic axes a, b, and c, respectively.

          圖片2.png

          Physical Properties:


          Crystal structure

          Orthorhombic, space group Pna21,point group mm2

          Cell parameters

          a=6.404?, b=10.616?, c=12.814?, Z=8

          Melting point

          Around 1172℃

          Mohs hardness

          5

          Density

          3.01 g/cm3

          Color

          colorless

          Hygroscopic susceptibility

          no

          Thermal conductivity

          0.13 W/(cm*K-1)

          Thermo-optic Coefficient

          dnx/dT=1.1x10-5/°C, dny/dT=1.3x10-5/°C, dnz/dT=1.6x10-5/°C

          Absorption coefficient

          <0.1%/cm @ 1064nm, <1%/cm @ 532nm

          Optical Properties:


          Transmitting range:

          350 nm - 4500 nm

          SHG Phase Matchable Range

          497~1800nm  (Type II)

          Refractive indices: 

                     1064nm

                     532nm

           nx           ny          nz

          1.7377   1.7453   1.8297

          1.7780   1.7886   1.8887

          Sellmeier equations:

          (λ in μm)

          nx2=3.0065+0.03901/(λ2-0.04251)-0.01327λ 2
          ny2=3.0333+0.04154/(λ 2-0.04547)-0.01408λ2
          nz2=3.3134+0.05694/(λ 2-0.05658)-0.01682λ2

          Nonlinear optical coefficients:

          d31=6.5pm/v,

          d32=5pm/v,

          d33=13.7pm/v,

          d24=7.6pm/v,

          d15=6.1pm/v

          Effective nonlinearity expressions

          deff (d?(II)24 - d15 - (dqsin2f)sin215sin2 + df24cos2q)sinf

          For type II SHG of a Nd:YAG Laser at 1064nm:

          =23.5°f=90°,  qPM angle: 

          Effective SHG coefficient:  deff8.3d?36(KDP)

          Angular bandwidth: 14.2mrad-cm (φ); 55.3mrad-cm (θ)

          Temperature bandwidth: 25℃-cm

          Spectral bandwidth: 5.6 ? -cm

          Walk-off angle: 0.55°

          Electro-optic coefficients:

          Low frequency (pm/V)              High frequency (pm/V)

          r13

          9.5

          8.8

          r23

          15.7

          13.8

          r33

          36.3

          35.0

          r51

          7.3

          6.9

          r42

          9.3

          8.8

          Dielectric constant:

          eeff=13

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