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/KTP Nonlinear crystal Potassium Titanyl Phosphate

KTP Nonlinear crystal Potassium Titanyl Phosphate

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

  • Product Origin:

    China
  • Shipping Port:

    Fuzhou, China
  • Lead Time:

    3-4weeks
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  • Product Detail

Descriptions:


KTP Nonlinear crystal Potassium Titanyl Phosphate is the most commonly used material for frequency doubling of Nd-doped lasers, particularly at the low or medium power density. It is widely used for frequency mixing to generate Red/Green/Blue output, and for OPO and OPA to generate visible to mid-infrared tunable output. It is also used for many E-O devices such as Q-switches and E-O modulators.


Main applications:

1) Frequency Doubling (SHG) of Nd-doped Lasers for Green/Red Output;

2) Frequency Mixing (SFM) of Nd Laser and Diode Laser for Blue Output;

3) Parametric Sources (OPG, OPA and OPO) for 600nm - 4500nm Tunable Ouptut;

4) E-O Modulators, Optical Switches, Directional Couplers;

5) Optical Waveguides for Integrated NLO and E-O DevicesOPA and OPO.


Advantages:

1) Large nonlinear optical coefficient;

2) Wide angular bandwidth and small walk-off angle

3) Broad temperature and spectral bandwidth;

4) High Electro-Optics(E-O) coefficient and low dielectric constant;

5) Non-hygroscopic, chemically and mechanically stable


Optical and Nonlinear properties of KTP crystal

Transparency Range

350~4500nm

SHG Phase Matchable Range

497 ~ 1800nm (Type II)

Therm-optic Coefficient (/, λ in μm)

dnx/dT=1.1X10-5
dny/dT=1.3X10-5
dnz/dT=1.6X10-5

Absorption Coefficients

<0.1%/cm at 1064nm <1%/cm at 532nm

Angle Acceptance

14.2mrad·cm (φ);55.3mrad·cm (θ) for Type II SHG of a Nd:YAG laser at 1064nm

Temperature Acceptance

24°C·cm for Type II SHG of a Nd:YAG laser at 1064nm

Spectral Acceptance

0.56nm·cm for Type II SHG of a Nd:YAG laser at 1064nm

Walk-off Angle

0.55° for Type II SHG of a Nd:YAG laser at 1064nm

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= 5 pm/V d15=6.1 pm/V
d33=13.7 pm/V

Sellmeier Equations (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

Electro-optic Coefficients:

r13

r23

r33

r51

r42

Low and High frequency (pm/V)

9.5 and 8.8

15.7and 13.8

36.3 and 35

7.3 and 6.9

9.3 and 8.8

Relative Dielectric Constant

εeff=13


Physical properties of KTP crystal

Crystal Structure

Orthorhombic, space group Pna21,point group mm2

Lattice Parameter

a=6.404Å, b=10.616Å, c=12.814A, Z=8

Melting Point

About 1172°C

Mohs Hardness

5

Density

3.01 g/cm3

Refractive indices

nX = 1,7404; nY = 1,7479; nZ = 1,8296 @1064 nm

Thermal Conductivity

13W/m/K

Thermal Expansion Coefficients

ax=11x10-6/, ay=9x10-6/, az=0.6x10-6/


HGO offers KTP specifications:

Tolerance of cutting angle

△θ≤±0.25°,△φ≤±0.25°

Tolerance of dimension

Dimension+0/-0.1 mmL±0.1mm

Flatness

λ/10 @ 632.8nm

Wavefront distortion

λ/8@ 632.8nm

Surface quality

10/5 per MIL-O-13830A

Parallelism

20

Perpendicularity

5

Clear Aperture:

> 90%

Chamfer:

< 0.1 mm @ 45°

Size

Upon customer request

Coating

AR/HR coating upon customer’s request

Damage Threshold

750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz

Quality Warranty Period

One year under proper use

Why Choose HGO ?

HGO can supply high quality potassium titanyl phosphate (KTiOPO4, KTP) nonlinear crystals. Size up to 20mm*20mm*40mm and length from 0.1mm up to 80mm.

Besides, HGO provides high grey track resistance HGTR-KTP crystals as a solution, which significantly improves the grey-track resistance and overall performance. HGTR-KTP crystals extend the use of KTP as a nonlinear medium to high-power applications.

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