Shandong Dazheng Crystals Co.,Ltd

Potassium Titanyl Phosphate (KTiOPO4 or KTP)

Advantages:

Large nonlinear  optical coefficient
Efficient  frequency conversion (1064nm SHG conversion efficiency is up to 80%) 
Wide angular  bandwidth and small walk-off angle 
Broad temperature and spectral bandwidth 
Nonhygroscopic,  excellent chemical and mechanical stability 
High thermal conductivity (2 times  that of BNN crystal ) 
High electro-optic coefficienct and low dielectric constant

Applications:

Frequency  doubling (SHG) of Nd-doped lasers for green/red output
Frequency mixing (SFM) of Nd laser and diode laser for blue output
Parametric sources (OPG, OPA and OPO) for 0.6mm-4.5mm 
Tunable output 
Electrical optical(E-O) Modulators, Optical Switches, and Directional Couplers
Optical Waveguides for Integrated NLO and E-O Devices

Physical and Chemical Properties:

Crystal Structure	Orthorhombic, point group mm2, space Pna2₁
Melting Point	1172°C incongruent
Curie Tempetature	936°C
Mohs Hardness	»5
Density	2.945 g/cm³
Specific Heat	0.1737 cal/g×°K
Thermal Conductivity	0.13 W/cm/°K
Electrical Conductivity	3.5×10^-8 s/cm (c-axis, 22°C, 1KHz)
Transmitting Range:	350 nm - 4500 nm
Refractive Indices: 1064nm 532nm	nx ny nz 1.7377 1.7453 1.8297 1.7780 1.7886 1.8887
Sellmeier Equations:	n_x²=3.0065+0.03901/(l 2-0.04251)-0.01327l 2 n_y²=3.0333+0.04154/(l 2-0.04547)-0.01408l 2 n_z²=3.0065+0.05694/(l 2-0.05658)-0.01682l 2 (l inmm)
Therm-optic Coefficients:	dn_x/dT=1.1×10^-5/°C, dn_y/dT=1.3×10^-5/°C, dn_z/dT=1.6×10^-5/°C

Nonlinear Optical Properties:

Phase matchable range:

497nm-1800nm

Nonlinear optical coefficients:

d₃₁=6.5pm/v,d₃₂=5pm/v, d₃₃=13.7pm/v,d₂₄=7.6pm/v,d₁₅=6.1pm/v

d_eff(II)» (d₂₄ - d₁₅)sin2fsin2q - (d₁₅sin²f + d₂₄cos²f)sinq

For type II SHG of a Nd:YAG:

Laser at 1064nm

PM angle: q=90°, f=23.5°

Effective SHG coefficient: d_eff»8.3×d₃₆(KDP)

Angular acceptance: 20 mrad-cm

Temperature acceptance: 25°C-cm

Spectral acceptance: 5.6 Å -cm

Walk-off angle: 4.5 mrad (0.26°)

Optical damage threshold: > 450MW/cm², (@ 1064nm, 10ns, 10Hz)

Main Specifications:

Transmitting wavefront  distortion: less thanλ/8 @ 633 nm
Dimension tolerance:  (W ± 0.05mm)×(H ± 0.05mm)×(L ±0.05mm)
Clear Aperture: >  90% central area
Flatness:λ/8@ 633 nm
Scratch/Dig code: 10/5  
Parallelism: ≤10〞
Perpendicularity: <5′
Angle tolerance: Dq<±0.2°, Df<±0.2°
Coating: R1064≤0.1%   R532≤0.2%
                     
Note:

To  inquire or order finished KTP crystals, please provide detailed specifications  
as  listed in the above.  We require engineering drawing for specific orientation.     
For special applications, please consult us for the designs if you are sure  about 
the phase matching angle.