ZnGeP2 (ZGP) Crystal

 

ZGP crystals have transmission band edges at 0.74 and 12 µm. However their useful transmission range is from 1.9 to 8.6 µm and from 9.6 to 10.2 µm. These crystals have the largest nonlinear optical coefficient and relatively high laser damage threshold. ZGP crystals can successfully be used in diverse applications: 

•    Up-conversion of CO₂ and CO laser radiation to near IR range via harmonics generation and mixing processes; 

•    Efficient SHG of pulsed CO, CO₂ and chemical DF-laser; 

•  Efficient down conversion of Holmium, Thulium and Erbium laser wavelengths to mid infrared wavelength ranges by OPO process.

LongSpectrum offer ZGP crystals with high damage threshold BBAR coatings and the lowest absorption coefficient α < 0.05 cm^-1 (at pump wavelengths 2.05 - 2.1 µm „o“- polarisation) for OPO applications. 

Typical absorption coefficient is <0.03 cm^-1 at 2.5 - 8.2 µm range.
 

Specifications:

Applications:

• 1. Second, third, and fourth harmonic generation of CO2 laser
• 2. Optical parametric generation (OPO) with pumping at a wavelengths of 2.05-2.94 μm and possibility to generate effectively 3-10 μm range
• 3. Second harmonic heneration of CO-laser
• 4. Producing coherent radiation in sub-millimetre-range from 70.0 μm to 1000 μm - terahertz range
• 5. Generation of combined frequencies of CO2 - and CO-lasers radiation and other lasers are working in the crystal transparency region.

Picture 3  ZGP Ingot



Picture 4  ZGP Ingot



Picture 5  ZGP Ingot
          

>> Download Datasheet of ZGP Crystals