Specifications

1.Crystal Structure:Cubic Garnet
2.Dopant Level:0.5 mol% ~ 3 mol%
3.Refractive Index:1.82 at 1064 nm
4.Chip<0.1

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 type Ⅰand type Ⅱ non-critial phase-matching (NCPM) in a wide wavelength range. KTP is the most commonly used material for frequency doubling of Nd:YAG laser and other Nd-doped lasers, particularly at the low or medium power density. The properties of KTP make it superior as an electro-optic modulator as well as an optical waveguide device, including phase modulators, amplitude modulators and directional couplers.

 

 

Applications:

• Second harmonic generator of radiation 1.064 µm
• Optical parametric oscilator in near IR region up to 4 µm
• Different frequency generator in near IR region

 

 

 

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
Parallelism:	<30"
Perpendicularity:	<10'
Wavefront Distortion:	< λ/8 @ 633nm
Clear Aperture:	> 90%
Coating:	According to customer request

 

Physical and Optical Properties:

Crystal Structure	orthorhombic system, space group Pna21, point group mm2
Cell Parameters	a=6.404?, b=10.616?, c=12.814, Z=8
Melting Point	About 1172 Degree
Mohs Hardness	5
Density	3.01 g/cm3
Thermal Conductivity	13W/m/K
thermal expansion coefficient	ax=11x10-6/0C, ay=9x10-6/0C, az=0.6x10-6/0C

Dialytic Wavebands	350~4500nm
SHG	497 ~ 1800nm (Type II)
Thermo-Optical Coeffecient(/°C)	dnx/dT=1.1X10-5 dny/dT=1.3X10-5 dnz/dT=1.6X10-5
Absorption Coefficient	<0.1%/cm at 1064nm <1%/cm at 532nm
For Type II SHG of a Nd:YAG laser at 1064nm	Temperature Acceptance: 24°C-cm Spectral Acceptance: 0.56nm-cm Angular Acceptance: 14.2mrad-cm (φ);55.3mrad-cm (q) Walk-off Angle: 0.55°
Nonlinear Coefficient	d31=6.5 pm/V d24=7.6 pm/V d32= 5 pm/V d15=6.1 pm/V d33=13.7 pm/V
Sellmeier Equation (λ in μm)	nx2=3.0065+0.03901/(λ2-0.04251)-0.01327λ2 ny2=3.0333+0.04154/(λ2-0.04547)-0.01408λ2 nz2=3.3134+0.05694/(λ2-0.05658)-0.01682λ2

 

 

 

 

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