KDP, KD*P (DKDP) Crystal for SHG, THG and SFG applications
Wide transparency region
Broad Type 1 and Type 2
Non-critical phase-matching (NCPM) range
Small walk-off angle
High damage threshold
Wide acceptance angle
High optical homogeneity
Potassium Dihydrogen Phosphate (KDP crystal) and Potassium Dideuterium Phosphate (KD*P or DKDP crystal) has a high nonlinear coefficient, which allows it to efficiently convert laser radiation to higher frequencies, such as second harmonic generation
(SHG), third harmonic generation (THG), and sum-frequency generation (SFG).
Specifications of KDP, KD*P (DKDP) Crystal
Thickness/Diameter Tolerance
±0.05 mm
Orientation Tolerence
< 0.5°
Size
3 mm ~ 150 mm or Upon customer request
Dimension Tolerances
±0.05 mm
Surface Quality
10/5 S/D per MIL-O-13830A
Parallelism
< 10 arcsec
Perpendicularity
< 5 arcmin
Clear Aperture
> 90%
Wavefront Distortion
λ/8 @ 633 nm
Surface Flatness
< λ/8 @ 632.8 nm
Chamfer
< 0.1 mm @ 45°
Coating
AR/HR/PR coating upon customer's request
Physical and chemical properties of KDP crystal
Chemical Formula
KH2PO4
Transparency Range
200 nm - 1500nm
Nonlinear Coefficients
d36=0.44 pm/V
Refractive index (@1064 nm)
no=1.4938, ne=1.4599
Electro-optical Coefficients
r41=8.8 pm/V; r63=10.3 pm/V
Longitudinal half-wave voltage
Vπ=7.65 KV (λ=546 nm)
Absorptance
0.07/cm
Optical damage threshold
> 5 GW/cm2
Physical and chemical properties of D*KDP crystal
Chemical Formula
KD2PO4
Transparency Range
200 nm - 1600nm
Nonlinear Coefficients
d36=0.40 pm/V
Refractive index (@1064 nm)
no=1.4948, ne=1.4554
Electro-optical Coefficients
r41=8.8 pm/V; r63=25 pm/V
Longitudinal half-wave voltage
Vπ=2.98 KV(λ=546 nm)
Absorptance
0.006/cm
Optical damage threshold
> 3 GW/cm2
Stock specification list
If need other specifications and quantities products, please contact us(sales@aogcrystal.com ).
Part Number
Size
Theta, θ
Phi, φ
Coating S1/S2
Application
KDP-Cry-001
12x12x5 mm
76.5
45
AR@532+266/532+266 nm
SHG@532 nm
KDP-Cry-002
15x15x7 mm
76.5
45
AR@532+266/532+266 nm
SHG@532 nm
DKDP-Cry-001
12x12x20 mm
53.5
0
AR@1064/1064+532 nm
SHG@1064 nm
DKDP-Cry-001
12x12x20 mm
59.5
0
AR@1064+532/355 nm
SHG@1064 nm
Notes
AR/HR/PR coatings are available at your specified wavelength.
Be sure to wear laser safety goggles when checking optical path and adjusting optical axis.
KDP, KD*P (DKDP) Crystal is relatively soft and therefore requires precautions to protect its polished surfaces.
When angle adjusting is necessary, keep in mind that the acceptance angle of KDP, KD*P (DKDP) Crystal is small.
Documents Download
KDP, D*KDP Nonlinear Crystals
PDF | 0.28MB | 2023-12-02 | V1.0 | EN
Specifications Drawing CAD
PDF | 0.16MB | 2023-12-02 | V1.0 | EN