KTP

Potassium Titanyl Phosphate (KTiOPO4 or KTP) is widely used in both commercial and military lasers including laboratory and medical system, range-finders, LiDAR, optical communication and industrial systems.

Classification:

Nonlinear Crystals

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Detailed introduction

Potassium Titanyl Phosphate(KTiOPO4 or KTP)is widely used in both commercial and military lasers including laboratory and medical system,range-finders,LiDAR,optical communication and industrial systems.

PRODUCT FEATURE

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

Specifications
Dimension Tolerance	(W±0.1mm)×(H±0.1mm)×(L±0.2mm/0.1mm)
Angle Tolerance	Δθ＜±0.2°；Δφ＜±0.2°
Parallelism	＜30"
Perpendicularity	＜10′
Clear Aperture	≥Central 90% of the diameter
Surface Quality (Scratch/Dig)	20/10 (MIL-PRF-13830B)
Flatness	<λ/8@633nm
Transmitted Wavefront Distortion	＜λ/8@633nm
Anti-Reflection Coating	According to customer requirements

Chemical and Structural Properties
Crystal Structure	Orthorhombic, Space group Pna21, Point group mm2
Lattice Parameter	a=12.81Å, b=6.404Å, c=10.616Å
Melting Point	About 1172℃
Mohs Hardness	5
Density	3.01g/cm3
Thermal Conductivity	13W/mK
Thermal Expansion Coefficients	ax=11×10^-6/℃, ay=9×10^-6/0C, az=0.6×10^-6/℃

Optical and Nonlinear Optical Properties
Transparency Range	350~4500nm
SHG Phase Matchable Range	497~1800nm (Type II)
Therm-optic Coefficient ( λ in μm)	dnx/dT=1.1×10^-5
	dny/dT=1.3×10^-5
	dnz/dT=1.6×10^-5
Absorption Coefficients	<0.1%/cm at 1064nm <1%/cm at 532nm
For Type II SHG of a Nd:YAG laser at 1064nm	Temperature Acceptance: 24℃·cm
	Spectral Acceptance: 0.56nm·cm
	Angular Acceptance: 14.2mrad·cm (φ); 55.3mrad·cm(θ)
	Walk-off Angle: 0.55°
NLO Coefficients	deff(II)≈(d₂₄- d₁₅)sin2φsin2θ;- (d₁₅sin²φ+ d₂₄cos²φ)sinθ
Non-vanished NLO Susceptibilities	d₃₁=6.5 pm/V d₂₄=7.6 pm/V
	d₃₂= 5pm/V d₁₅=6.1 pm/V
	d₃₃=13.7 pm/V
Sellmeier Equations (λ in μm)	n_x²=3.0065+0.03901/(l 2-0.04251)-0.01327λ²
	n_y²=3.0333+0.04154/(l 2-0.04547)-0.01408λ²
	n_z²=3.3134+0.05694/(l 2-0.05658)-0.01682λ²