KTP (KTiOPO4) is a nonlinear optical crystal, which possesses excellent nonlinear and electro-optic properties.It has large nonlinear optical coefficients and wide angular bandwidth and small walk-off angle,etc.which make it suitable for various nonlinear frequency conversion and wave guide online_ordering.

Due to very high effective nonlinearity (d eff ~8.3xd 36 (KDP)at 1.06μ m) and excellent optical properties,KTP perfectly suits as lasing material in various online_orderings .The phase matching range of KTP crystal lies in 0.99-3.3 μ m region .This allows us to use KTP as an intracavity and extracavity frequency double for the most commonly used lasers,such as Nd:YAG,Nd:Glass and Nd:YLF 

Capabilities : 

1) Aperture:1x1 ~ 10x10mm 
2) Length: 0.05 ~ 20mm 
3) Phase Matching Angle: 

Determined by different homonic generartion 
typical θ=90°; φ=23.5° for SHG 1064nm 

4) Phase matching type:Type II 
5) Typical Coating: 
a) AR @1064nm R<0.1%; AR @ 532nm, R<0.25%. (see Coating 18-1)
b) HR @1064nm, R>99.8%; HT @808nm, T<0.5% (see Coating 18-2)
Different coating specification upon customer request. 

Typical Specification and Tolerance: 

1) Angle tolerance: Δθ< ± 0.2°; Δφ< ±0.2° 
2) Dimension tolerance: (W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2mm/-0.1mm) 
3) Flatness: λ/8 @ 633nm 
4) Scratch/Dig code: better than 10/5 Scracth/dig per MIL-O-13830A 
5) Parallelism: < 20 arc seconds 
6) Perpendicularity:< 5 arc minutes 
7) Wavefront distortion: < λ/8 @ 633nm 
8) Clear aperture: > 90% central area 

Physical and Optical Properties 

Crystal structure Orthorhombic, point group mm ² 
Melting point 1172°C incongruent 
Cell parameters a=6.404?, b=10.616?, c=12.814?, Z=8 
Curie point 936°C 
Mohs hardness ~5 
Density 3.01 g/cm ³ 
Color colorless 
Hygroscopic susceptibility no 
Specific heat 0.1643 cal/g.°C 
Thermal conductivity 0.13 W/cm/°K 
Electrical conductivity 3.5x10 ^-8 s/cm (c-axis, 22°C, 1KHz) 

Transmitting Range 350nm~4500nm 
nx ny nz 
Refractive Indices 1064nm 1.7377 1.7453 1.8297 
532nm 1.7780 1.7886 1.8887 
Absorption Coefficients α < 1% / cm @ 1.064 μm 　 　 
Phase Matchable Range 0.984-3.4μm 　 　 　 
Therm-Optic dnx / dT= 1.1x10 /°C,dny / dT= 1.3x10 /°C,dnz / dT=1.6x10 /°C 
Coefficients 　 　 　 　 
Nonlinear d31=2.54pm/V, d32=1.35pm/V, d33=16.9pm/V 
Optical Coefficients d24=3.64pm/V, d15=1.91pm/V, at 1.064μm 
deff(II) (d24-d15)sin2Φsin2θ-(d10sin Φ+d24cos Φ)sinθ 
Low frequency High frequency 
(pm/V) 　 (pm/V) 
Electro-Optic r13 9.5 　 8.8 
Coefficients r23 15.7 　 13.8 
r33 36.3 　 35.0 
r51 7.3 　 6.9 
r42 9.3 　 8.8 
Dielectric Constant εeff=13 　 　 　 
nx = 3.0065 + 0.03901/(λ - 0.04251) - 0.01327λ 
Sellmeier Equations ny = 3.0333 + 0.04154/(λ - 0.04547) - 0.01408λ 
nz = 3.3134 + 0.05694/(λ - 0.05658) - 0.01682λ 

Physical and Optical Properties

Crystal structure Orthorhombic, point group mm ² Melting point 1172°C incongruent Cell parameters a=6.404?, b=10.616?, c=12.814?, Z=8 Curie point 936°C Mohs hardness ~5 Density 3.01 g/cm 3 Color colorless Hygroscopic susceptibility no Specific heat 0.1643 cal/g.°C Thermal conductivity 0.13 W/cm/°K Electrical conductivity 3.5x10 -8 s/cm (c-axis, 22°C, 1KHz) Transmitting Range 350nm~4500nm 　 　 nx ny nz Refractive Indices 1064nm 1.7377 1.7453 1.8297 　 532nm 1.7780 1.7886 1.8887 Absorption Coefficients α < 1% / cm @ 1.064 μm 　 　 Phase Matchable Range 0.984-3.4μm 　 　 　 Therm-Optic dnx / dT= 1.1x10? /°C,dny / dT= 1.3x10? /°C,dnz / dT=1.6x10? /°C Coefficients 　 　 　 　 Nonlinear d₃₁=2.54pm/V,? d32=1.35pm/V,? d₃₃=16.9pm/V Optical Coefficients d₂₄=3.64pm/V,? d15=1.91pm/V,? at 1.064μm 　 deff(II)? (d24-d15)sin2Φsin2θ-(d10sin? Φ+d24cos Φ)sinθ 　 　 Low frequency High frequency 　 　 (pm/V) 　 (pm/V) Electro-Optic r13 9.5 　 8.8 Coefficients r23 15.7 　 13.8 　 r33 36.3 　 35.0 　 r51 7.3 　 6.9 　 r42 9.3 　 8.8 Dielectric Constant εeff=13 　 　 　 　 nx = 3.0065 + 0.03901/(λ - 0.04251) - 0.01327λ Sellmeier Equations ny = 3.0333 + 0.04154/(λ - 0.04547) - 0.01408λ 　 nz = 3.3134 + 0.05694/(λ - 0.05658) - 0.01682λ

Standard KTP for SHG of 1064nm

Notes:

1.To inquiry or order a finished KTP crystals, please specify the specification listed above, we kindly request engineering drawing to specify orientation, Please consult us for the designs if you're sure about the phase matching angle for others' special specifications. 
2.For information of handling and Mark of Mark of KTP.

Part No.

q

S1 S2 KTP001

AR@1064nm R<0.2% 
AR@532nm R<0.5% AR@1064nm R<0.2% 
AR@532nm R<0.5% KTP002

HR@1064nm R>99.8% 
AR@ 532nm R<0.5% AR@1064nm R<0.2% 
AR@532nm R<0.5% KTP003

HR@1064nm R>99.8% 
AR@ 532nm R<0.5% AR@1064nm R<0.2% 
AR@532nm R<0.5%