Ktp Crystal, Wide Transmittance, Low Dielectric Constant

• After-sales Service: After-Sale Service
• Warranty: 12
• Materials: Potassium Titanium Oxide Phosphate
• Model NO.: FW-CRYSTAL
• Shipping: FedEx,DHL,UPS...
• Lead Time: 1 Week
• Transport Package: Box
• Specification: costomized
• Trademark: FineWin
• Origin: Henan China

Product Description

Non-linear Optical Crystals (NLO Crystals) have extended the laser spectrum from deep UV to far IR by various harmonic generations (like SHG, THG, 4HG, 5HG), sum frequency generations, difference frequency generations, optical parametric oscillators, etc.

Product Description:
Potassium Titanium Oxide Phosphate (KTiOPO₄ ), or KTP, is an efficient nonlinear optical crystal in the visible to infrared spectral region with relatively low cost. It has large nonlinear coefficient. The effective nonlinear optical coefficient of KTP deff at 1064nm is more than 1.5 times that of BBO. It's damage threshold is near 1 GW/cm² for 1 Hz 10 ns pulses at 1064nm.

Application:
KTP crystal is a kind of popular nonlinear optical crystal with excellent nonlinear optical properties. As a frequency conversion optical material, KTP crystal had been widely used in scientific research and technique and many other fields, especial best for small and medium-sized power frequency doubling. Frequency doubler and photoparametric amplifier produced by KTP crystal had been had been applied in solid-state tunable laser light source. he 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.

Main Specification:

Main Specifications
Dimension	1x1x0.05 - 30x30x40 mm
Phase matching type	Type II, θ=90°; φ=phase-matching angle
Typical Coating	a) S1&S2: AR @1064nm R<0.1%; AR @ 532nm, R<0.25%. b) S1: HR @1064nm, R>99.8%; HT @808nm, T>5% S2: AR @1064nm, R<0.1%; AR @532nm, R<0.25% Customized coating available upon customer request.
Angle tolerance	6' Δθ< ± 0.5°; Δφ< ±0.5°
Dimension tolerance	±0.02 - 0.1 mm (W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2mm/-0.1mm) for NKC series
Flatness	λ/8 @ 633nm
Scratch/Dig code	10/5 Scratch/dig per MIL-O-13830A
Parallelism	<10' better than 10 arc seconds for NKC series
Perpendicularity	5' 5 arc minutes for NKC series
Wavefront distortion	less than λ/8 @ 633nm
Clear aperture	90% central area
Working temperature	25°C - 80°C
Homogeneity	dn ~10^-6/cm

Physical and Chemical Properties

Crystal structure

Orthorhombic

Point group

mm2

Melting point

1172°C incongruent

Lattice parameters

a=6.404Å, b=10.615Å, c=12.814Å, Z=8

Temperature of decomposition

~1150°C

Transmition temperature

936°C

Mohs hardness

~5

Density

2.945 g/cm³

Color

colorless

Hygroscopic susceptibility

no

Specific heat

0.1737 cal/g.°C

Thermal conductivity

0.13 W/cm/°C

Electrical conductivity

3.5x10^-8 s/cm (c-axis, 22°C, 1KHz)

Thermal expansion coefficients

a₁ = 11 x 10^-6 °C^-1
a₂ = 9 x 10^-6 °C^-1
a₃ = 0.6 x 10^-6 °C^-1

Thermal conductivity coefficients

k₁ = 2.0 x 10^-2 W/cm °C
k₂ = 3.0 x 10^-2 W/cm °C
k₃ = 3.3 x 10^-2 W/cm °C

Dielectric constant

e_eff = 13

Optical Properties

Transmitting range

350nm ~ 4500nm

Refractive indices

n_x

n_y

n_z

1064nm

1.7400

1.7469

1.8304

532nm

1.7787

1.7924

1.8873

Absorption coefficients

a < 1%/cm @1064nm and 532nm

Therm-optic coefficients

dn_x/dT=1.1x10^-5/°C
dn_y/dT=1.3x10^-5/°C
dn_z/dT=1.6x10^-5/°C

Electro-optic coefficients

	Low frequency (pm/V)	High frequency  (pm/V)
r13	9.5	8.8
r23	15.7	13.8
r33	36.3	35.0
r51	7.3	6.9
r42	9.3	8.8

Sellmeier equations

n_x²=2.10468 + 0.89342λ²/(λ²-0.04438)-0.01036λ² 
n_y²=2.14559 + 0.87629λ²/(λ²-0.0485)-0.01173λ² 
n_z²=1.9446 + 1.3617λ²/(λ²-0.047)-0.01491λ²

Nonlinear Properties

Phase matching range

497nm - 3300 nm

Nonlinear coefficients
 (@ 10-64nm)

d₃₁=2.54pm/V, d₃₁=4.35pm/V, d₃₁=16.9pm/V
d₂₄=3.64pm/V, d₁₅=1.91pm/V at 1.064 mm

Effective nonlinear optical coefficients

d_eff(II)≈ (d₂₄ - d₁₅)sin²qsin²j - (d₁₅sin²j + d₂₄cos²j)sinq

Type II SHG of 1064nm Laser

Phase matching angle

q=90°, f=23.2°  

Effective nonlinear optical coefficients

d_eff »8.3 x d₃₆(KDP)  

Angular acceptance

D_θ= 75 mrad  D_φ= 18 mrad

Temperature acceptance

25°C.cm  

Spectral acceptance

5.6 Åcm

Walk-off angle

1 mrad

Optical damage threshold

1.5-2.0MW/cm²

Advantage:

Efficient frequency conversion(1064nm SHG conversion efficiency is about 80%)

 

Large nonlinear optical coefficients(15 times that of KDP)

 

Wide angular bandwidth and small walk-off angle

 

Broad temperature and spectral bandwidth

 

High thermal conductivity (2 times that of BNN crystal )

 

Moisture free

 

Minimum mismatch gradient

 

Super-polished optical surface

 

No decomposition below 900°C
Mechanically stable 

 

Low cost compare with BBO and LBO