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For example
e.g. SHG @1064
SFG @800+267->200
DFG @780-842->10600
OPO @355->460+560+960+1150 etc
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For example
e.g. P-coating
ARC @1064 R<0.25%
ARC @1064 R<0.25% + 532 R<0.5%
BBAR @1064 R<1% + 3÷10 R<5%
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Nonlinear optical crystal ZnGeP2 |
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| Main properties |
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| Transparency range, µm |
0.7 - 12.0 |
| Nonlinear coefficient, pm/V |
d36=75 ± 8 |
| Syngony |
Tetragonal |
| Lattice parameters, nm |
a=0.5465, b=1.0710 |
| Microhardness, GPa |
6.0 ± 0.2 |
| Birefringence |
0.04 |
| Density, g/cm3 |
4.158 |
Typical Reflection index |
10.6 µm 5.5 µm |
no=3.0738 ne=3.1137 no=3.1131 ne=3.1518 |
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| The parameters of optical elements |
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| Orientation accuracy, arc min |
< 30 |
| Parallelism, arc sec |
< 30 |
| Flatness |
546 nm |
l/4 |
| Surface quality, scratch/dig |
30/20 |
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| Application |
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ZnGeP2 single crystals are designed for laser frequency conversion from one spectral range to another one and can be used for:
- creation of optical parametric oscillators (OPO) - coherent radiation sources tunable within 2.5-12 µm spectral range when pumping with a laser radiation of 2 µm wavelength;
- generation of CO- and CO2 -laser radiation harmonics;
- generation of radiation of both sum and difference frequencies from CO, CO2 and other middle IR range lasers radiation (1 - 11 µm).
Coherent radiation sources tunable in 2-11 µm spectral range based on parametric frequency conversion of laser radiation allow solving a number of applied problems of high-resolution spectroscopy:
- remote monitoring of industrial and anthropogenic emissions to the atmosphere;
- remote identification and monitoring of concentration of various toxic gas mixtures and gaseous products or industrial discharge in power engineering, chemistry, and petroleum industry;
- creation of detection systems for monitoring of pipeline breaking;
- design of warning systems for explosive mixtures (methane);
- monitoring and control of special technological processes, for example, annihilation of toxic agents.
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