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KTP crystal
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   KTP crystal is mostly used as nonlinear crystals for frequency doubling of solid-state Nd:YAGcrystal or Nd:YVO4 crystal laser, as it has large nonlinear optical coefficients, wide angular bandwidth and small walk-off angle, broad temperature and spectral bandwidth. KTP crystal alsohas high electro-optic (E-O) coefficient and low dielectric constant, and large figure of merit,these features make it also widely used in electro-optic application.
Advantages
 Large Nonlinear Optical (NLO) Coefficients
 Wide Angular Bandwidth and Small Walk-off Angle
 Broad Temperature and Spectral Bandwidth
 High Electro-Optic (E-O) Coefficient and Low Dielectric Constant
 Large Figure of Merit for an Optical Waveguide Modulator
 Nonhygroscopic, Good Chemical and Mechanical Properties

Capabilities:

Aperture:

2x2 ~ 10x10mm

Long:

0.1 - 20mm

Cutting Angle q and f:

Determined by different kinds of homonic generartion

Phase matching type:

Type I or Type II

End Configuration:

Plano/Plano or Brewst/Brewst or Specified



Specifications:

Angle tolerance:

Δθ< ± 0.5°; Δφ< ±0.5°

Dimensional Tolerance:

(W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2mm/-0.1mm)

Flatness:

<λ/8 at 633nm

Surface Quality:

10/5 Scratch/Dig

Parallelism:

< 20 arc seconds

Perpendicularity:

< 5 arc minutes

Wave front Distortion:

<λ/8 at 632.8nm

Clear Aperture:

Central 95%

Chamfer:

0.15x45°

Coating:

a) * S1,S2: AR @ 1064 nm R<0.1% & 532nm R<0.25%
b) * S1:HR @ 1064nm R>99.8% & HT@ 808nm T>95% 
       S2:AR @ 1064 nm R<0.1% & 532nm R<0.25%


 Properties:

Crystal structure

Orthorhombic, point group mm2

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/cm3

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

Refractive indices

-

nx

ny

nz

1064nm

1.7377

1.7453

1.8297

532nm

1.7780

1.7886

1.8887

Absorption coefficients

a < 1%/cm @1.064μ m and 0.532μ m

Phase match range

0.984 - 3.4 μ m

Therm-optic coefficients

dnx/dT=1.1x10-5/°C, dny/dT=1.3x10-5/oC, dnz/dT=1.6x10-5/°C

Nonlinear optical coefficients

d31=2.54pm/V, d31=4.35pm/V, d31=16.9pm/V
d24=3.64pm/V, d15=1.91pm/V at 1.064 mm
deff(II)≈ (d24 - d15)sin2fsin2q - (d15sin2f + d24cos2f)sinq

Electro-optic coefficients

-

Low frequency(pm/V)

High frequency(pm/V)

g13
g23
g33
g51
g42

9.5
15.7
36.3
7.3
9.3

8.8
13.8
35.0
6.9
8.8

Dielectric constant

eeff=13


Sellmeier equations
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/(l2-0.05658)-0.01682l2

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Guangdong,China,518000

TEL:+86-755-33295277

FAX:+86-755-33295277

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