ZGP(ZnGeP2) Crystals

ZGP crystals possess large nonlinear coefficients (d36=75pm/V), wide infrared transparency range(0.75-12μm), high thermal conductivity(0.35W/(cm·K)), high laser damage threshold (2-5J/cm2)and well machining property, ZnGeP2 crystal was called the king of infrared nonlinear optical crystals and is still the best frequency conversion material for high power, tunable infrared laser generation. We can offer high optical quality and large diameter ZGP crystals with extremely low absorption coefficient α < 0.02 cm-1(at pump wavelengths 2.0-2.1 µm), which can be used to generate mid-infrared tunable laser with high efficiency through OPO or OPA processes.

Chemical: ZnGeP2

Density: 4.162 g/cm3

Mohs Hardness: 5.5

Optical Class: Positive uniaxial

Userful Transmission Range: 2.0 um - 10.0 um

Thermal Conductivity @ T= 293 K: 35 W/m∙K (⊥c)
36 W/m∙K ( ∥ c)

Thermal Expansion @ T = 293 K to 573 K: 17.5 x 106 K-1 (⊥c)
15.9 x 106 K-1 ( ∥ c)

WhatsApp Send email to us Download as PDF

Product Detail

Technical parameters

Test report

Video

Stock list

Zinc Germanium Phosphide (ZGP) crystals possess large nonlinear coefficients (d36=75pm/V). Our ZGP has wide infrared transparency range(0.75-12μm), useful transmission from 1.7um. ZGP also shows high thermal conductivity(0.35W/(cm·K)), high laser damage threshold (2-5J/cm2)and well machining property.

ZnGeP2 (ZGP) crystal is called the king of infrared nonlinear optical crystals and it is still the best frequency conversion material for high power, tunable infrared laser generation. DIEN TECH offers high optical quality and large diameter ZGP crystals with extremely low absorption coefficient α < 0.02 cm-1(at pump wavelengths 2.0-2.1 µm). These properties enable ZGP crystals to be used to generate mid-infrared tunable laser with high efficiency through OPO or OPA processes.

DIEN TECH provides two types of ZnGeP2 crystal, C-ZGP and YS-ZGP. YS-ZGP shows lower absorption at 2090nm than C-ZGP. C-ZGP absorption coefficient at 2090nm <0.05cm-1 while YS-ZGP absorption coefficient at 2090nm <0.02cm-1 . C-ZGP grew by vertical method while YS-ZGP grew by horizontal method. Also, YS-ZGP shows better homogeneity and output efficiency as well.

Applications of ZGP:

• Second, third, and fourth harmonic generation of CO2-laser.

• Optical parametric generation with pumping at a wavelength of 2.0 µm.

• Second harmonic generation of CO-laser.

• YS-ZGP are typical material for THz range from 40.0 µm to 1000 µm, pumped by 1um.

• Generation of combined frequencies of CO2- and CO-lasers radiation and other lasers are working in the crystal transparency region.

Custom orientations of our ZGP crystals are available on request.

Basic Properties
Chemical	ZnGeP2
Crystal Symmetry and Class	Tetragonal, -42m
Lattice Parameters	a = 5.467 Å
Lattice Parameters	c = 12.736 Å
Density	4.162 g/cm3
Mohs Hardness	5.5
Optical Class	Positive uniaxial
Userful Transmission Range	2.0 um – 10.0 um
Thermal Conductivity @ T= 293 K	35 W/m∙K (⊥c) 36 W/m∙K ( ∥ c)
Thermal Expansion @ T = 293 K to 573 K	17.5 x 106 K-1 (⊥c) 15.9 x 106 K-1 ( ∥ c)

Technical Parameters
Surface flatness	PV<ʎ/8@632.8nm
Surface quality S-D	20-10
Wedge/Parallelism error	<30 arc sec
Perpendicularity	<5 arc min
Transparency range	0.75 – 12.0
Non-linear coefficient	d₃₆= 68.9 (at 10.6 um),d₃₆= 75.0 (at 9.6 um)

Model	Product	Size	Orientation	Surface	Mount	Quantity
BMP000073	ZnGeP2	6620mm	θ=56.8°φ=0°	Both sides polished	Unmounted	2
BMP000079	ZnGeP2	68.50.035mm	θ=48.4°φ=0°	Both sides polished	Unmounted	1
BMP000080	ZnGeP2	6630mm	θ=54.7°φ=0°	Both sides polished	Unmounted	3
BMP000091	ZnGeP2	6620mm	θ=59°φ=0°	Both sides polished	Unmounted	1
BMP000144	ZnGeP2	551mm	θ=51° φ=0°	Both sides polished	Unmounted	12
BMP000324M	ZnGeP2	550.5mm	θ=51°φ=0° Type I	Both sides polished	φ25.4mm	17
BMP000325M	ZnGeP2	550.25mm	θ=51°φ=0° Type I	Both sides polished	φ25.4mm	9
BMP000413	ZnGeP2	6820mm	θ=54.0°,φ=0°	Both sides polished	Unmounted	1
BMP000463	ZnGeP2	6820mm	θ=60°φ=0°	Both sides polished	Unmounted	2
CM000016	ZnGeP2	6625mm	θ=50.5°φ=0°	AR/AR@2090nm(R<0.25%)+3-5um(R<1%)	Unmounted	1
CM000017	ZnGeP2	6630mm	θ=54.5°φ=0°	AR/AR@2.1um+3-5um	Unmounted	2
CM000018	ZnGeP2	6630mm	θ=54.7°φ=0°	AR/AR@2090nm+3-5μm	Unmounted	3
CM000019	ZnGeP2	6620mm	θ=54.7°φ=0°	AR/AR@2090nm(R<0.25%)+3-5um(R<1%)	Unmounted	6
CM000028	ZnGeP2	6625mm	θ=57.5°φ=0°	AR/AR@2.1um+3-5um	Unmounted	1
CM000029	ZnGeP2	6815mm	θ=54°φ=0°	AR/AR@2090nm(R<0.25%)+3-5um(R<1%)	Unmounted	1
CM000030	ZnGeP2	121215mm	θ=54.7°φ=0°	AR/AR@2090nm+3-5μm	Unmounted	1
CM000031	ZnGeP2	6820mm	θ=54°φ=0°	AR/AR@2090nm(R<0.25%)+3-5um(R<1%)	Unmounted	6
CM000068	ZnGeP2	8820mm	θ=54.7°φ=0°	AR/AR@2090nm(R<0.25%)+3-5um(R<1%)	Unmounted	1
CM000081M	ZnGeP2	15151.5mm	θ=48.6°φ=0°	AR/AR@2-3.3μm(R<2%)+7-12μm(R<5%)	φ25.4mm	1
CM000082	ZnGeP2	15152.5mm	θ=48.6°φ=0°	AR/AR@2-3.3μm(R<2%)+7-12μm(R<5%)	Unmounted	1
CM000083	ZnGeP2	15150.5mm	θ=48.6°φ=0°	AR/AR@1.8-3.5um+5-11um	Unmounted	2
CM000084M	ZnGeP2	15151mm	θ=48.6°φ=0°	AR/AR@1.8-3.5um+5-11um	φ25.4mm	1
CM000088	ZnGeP2	884mm	θ=57.5°φ=0°	AR/AR@1.7-3um+5-13um	Unmounted	2
CM000190	ZnGeP2	665mm	θ=48°φ=0°	AR/AR@2-3um+5-9um	Unmounted	1
CM000191	ZnGeP2	6620mm	θ=57.5°φ=0°	AR/AR@2090nm(R<0.25%)+3-5um(R<1%)	Unmounted	1
CM000206	ZnGeP2	6615mm	θ=54.7°φ=0°	AR/AR@2.1um+3-5um	Unmounted	3
CM000226	ZnGeP2	6627mm	θ=50.11°φ=0°	AR/AR@2.09+2.8+8um T=47.8%	Unmounted	1
CM000227	ZnGeP2	6627mm	θ=50.5°φ=0°	AR/AR@2.09+2.8+8um	Unmounted	1
CM000228	ZnGeP2	6627mm	θ=51.2°φ=0°	AR/AR@2.09+2.8+8um	Unmounted	1
CM000255	ZnGeP2	6640mm	θ=54.7°φ=0°	AR/AR@2.1μm+3-5μm	Unmounted	1
CM000261	ZnGeP2	5520mm	θ=67°φ=0°	AR/AR@5um+10um	Unmounted	1
CM000336	ZnGeP2	884mm	θ=57.5°φ=0°	S1:AR@1.3-2.6um S2:AR@3.5-10um	Unmounted	3
CM000337	ZnGeP2	881mm	θ=57.5°φ=0°	S1:AR@1.3-2.6um S2:AR@3.5-10um	Unmounted	2
CM000565	ZnGeP2	887.5mm	θ=57.5°φ=0°	AR/AR@1.7-3um+5-13um	Unmounted	1
CM000586	ZnGeP2	7720mm	θ=62°φ=0°	AR/AR@1.8-4.2um	Unmounted	1
CM000621	ZnGeP2	868.5mm	θ=55°φ=0°	AR/AR@2.09um(R<0.5%)+3.5-5um(R<1%)	Unmounted	1
CM000675	ZnGeP2	6625mm	θ=50.4°φ=0°	AR/AR@2090+2800+8um	Unmounted	1
CM000751	ZnGeP2	6820mm	θ=60°φ=0°	AR/AR@1938+3000-5000nm	Unmounted	1
CM000799	ZnGeP2	6620mm	θ=56.2°φ=0°	AR/AR@1.9μm-2.1μm+3.8μm-4.5μm	Unmounted	1
CM000900	ZnGeP2	551mm	θ=51°φ=0° Type 1	S1:AR@1-4um(R<8%) S2:AR@3-12um(R<10%)	Unmounted	2
CM000912	ZnGeP2	6620mm	θ=55 °, φ=0°	AR/AR@2.05µm+3-5µm	Unmounted	1
CM000985	ZnGeP2	551mm	θ=51°Φ=0°	S1:AR@1000-3500nm S2:AR@3000-12000nm	Unmounted	1
CM000986	ZnGeP2	551.5mm	θ=51°Φ=0°	S1:AR@1000-3500nm S2:AR@3000-12000nm	Unmounted	1
CM001049	ZnGeP2	6625mm	θ=54.7°φ=0°	AR/AR@2.1+3-5um	Unmounted	2
CM001058	ZnGeP2	6620mm	θ=54.7°φ=0°	AR/AR@2.1+3-5um	Unmounted	1
CM001066M	ZnGeP2	φ5*1mm	θ=51°Φ=0°	S1:AR@1000-3500nm S2:AR@3000-12000nm	φ25.4mm	1