KTP

Description:

KTP (KTiOPO₄) is an excellent non-linear crystal. It exhibts high optical quality, broad transparent range, relatively effective SHG coefficient (about 3 times higher than that of KDP), very high optical damage threshold, wide acceptance angle, small walk-off, and typeⅠand typeⅡnon-critial phase-matching (NCPM) in a wide wavelength range.

Features:

Large nonlinear optical coefficients;
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；
High thermal conductivity;
Extremely low cost compared to BBO and LBO.

Applications:

Second harmonic generator of radiation 1064 nm;
Optical parametric oscilator in near IR region up to 4 µm;
Different frequency generator in near IR region.

Chemical and Physical Properties:

Crystal Structure	Orthorhombic, point group mm2
Lattice Parameters	a=6.404Å, b=10.616Å, c=12.814Å; Z=8
Density	3.02 g/cm3
Mohs Hardness	~ 5
Melting Point	1172°C (Incongruent)
Curie Point	936°C
Specific Heat	0.1643 cal/goC (25°C)
Dielectric Constant	eeff = 13
Absorption Coefficient	< 0.1%/cm@1.064μm and < 1%/cm@0.532μm
Thermal Conductivity	13 W/m/°C
Electrical Conductivity	1.22x10-6s/cm (c-axis, 22oC, 2KHz)
Hygroscopic Susceptibility	no

Optical and NLO Properties:

Crystal Structure	Orthorhombic, point group mm2
Lattice Parameters	a=6.404Å, b=10.616Å, c=12.814Å; Z=8
Density	3.02 g/cm3
Mohs Hardness	~ 5
Melting Point	1172°C (Incongruent)
Curie Point	936°C
Specific Heat	0.1643 cal/goC (25°C)
Dielectric Constant	eeff = 13
Absorption Coefficient	< 0.1%/cm@1.064μm and < 1%/cm@0.532μm
Thermal Conductivity	13 W/m/°C
Electrical Conductivity	1.22x10-6s/cm (c-axis, 22oC, 2KHz)
Hygroscopic Susceptibility	no

Optical and NLO Properties:

Transparency Region	350nm ~ 4.5μm
Nonlinear Coefficients(@1.064μm)	d31=2.54 pm/V, d32=4.35 pm/V, d33=16.9 pm/V
	d24=3.64 pm/V, d15=1.91 pm/V
	deff(ll)≈(d24-d15)sin2fsin2q -(d15sin2f+d24cos2f)sinq
	(Where q, f are polar angles referring to Z, X axis)
Refractive Indexes	nx	ny		nz
	1.74	1.746		1.83	(@1064nm)
	1.778	1.789		1.888	(@532nm)
Sellmeier Equations(l in μm)	nx2 = 3.0065+0.03901/(l2-0.04251)-0.01327l2
	ny2 = 3.0333+0.04154/(l2-0.04547)-0.01408l2
	nz2 = 3.3134+0.05694/(l2-0.05660)-0.01682l2
Therm-optic Coefficients	dnx/dT = 1.1x10-5/ °C, dny/dT = 1.3x 10-5/°C
	dnz/dT = 1.6x 10-5/°C
Electro-optic			Low frequency		High frequency
Coefficients (pm/V)	g13		9.5		8.8
	g23		15.7		13.8
	g33		36.3		35
	g51		7.3		6.9
	g42		9.3		8.8
Damage Threshold	> 500 MW/ cm2 @ 1.064μm (10 ns, 10 Hz)
	> 5 GW/ cm2 @ 1.064μm (20 ps, 100 Hz)

Specifications:

Flank Size(W*H)	1×1~15×15
Length(L)	0.05~20mm
Angle Tolerance	Δθ< ± 0.2°; Δφ< ±0.2°
Size Tolerance	(W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2mm/-0.1mm)
Flatness	<λ/8 @ 633nm
Smooth Finish	20/10 Srcatch/Dig
Parallelism	＜30"
Perpendicularity	＜10'
Wavefront Distortion	< λ/8 @ 633nm
Clear Aperture	> 90%
Coating	Upon customer's request

KTP

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