Nonlinear Crystals


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Product Catalog 2017

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ZnGeP2 Crystals

ZnGeP2 Crystals
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Transparency range 0.75-12 μm
Dimensional tolerances +0/-0.1 mm
Length tolerance ±0.1 mm
Orientation accuracy of cut angle <30 arcmin
Surface quality 20-10 S-D
Surface flatness <λ/4 @ 632.8 nm
Parallelism error <30 arcsec
Perpendicularity <5 arcmin
Protective chamfers <0.1 mm x 45°
Material optical damage threshold 80 MW/cm², 20 ns pulses @ 2.05 μm
20 ns pulses @ 2.05 μm
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Zinc-Germanium Diphosphide (ZnGeP2, ZGP) single crystals are highly-effective non-linear optical crystals for the mid-IR as well as terahertz range. ZnGeP2 crystals have positive birefringence which allows to carry out phasematched parametric frequency conversion of optical radiation in all the ranges of their background transparency spectrum from 0.75 to 12.0 μm. Its useful transmission range lies from 1.9 to 10.6 μm with absoprtion of lower than 0.05 cm-1 @ 2.05 μm. ZnGeP2 has large non-linear optical coefficient and a relatively high laser damage threshold.
varna Second, third, and fourth harmonic generation of CO2 laser
varna Optical parametric generation (OPO) with pumping at a wavelengths of 2.05-2.94 μm and possibility to generate effectively 3-10 μm ranges
varna Second harmonic heneration of CO-laser
varna Producing coherent radiation in sub-millimetre-range from 70.0 μm to 1000 μm - terahertz range
varna Generation of combined frequencies of CO2 - and CO-lasers radiation and other lasers are working in the crystal transparency region

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