ZnGeP2 consists of Zinc, germanium and phosphorus atoms arranged in a specific crystal structure. It is known for its excellent optical properties, particularly in the mid infrared region. It is widely used in OPOs for generating tunable mid-IR radiation.
High damage threshold
High thermal conductivity
Large nonlinearity coefficient
The transmission area is 74 um to 12 um
Phase matching over a wide spectral range
SPECIFICATIONS | |
Dimension Tolerance | (W±0.1mm)×(H±0.1mm)×(L±0.2mm/0.1mm) |
Angle Tolerance | Δθ＜±0.2°；Δφ＜±0.2° |
Parallelism | ＜30" |
Perpendicularity | ＜10′ |
Surface Quality (Scratch/Dig) | 20/10 (MIL-PRF-13830B) |
Flatness | <λ/8@633nm |
Anti-Reflection Coating | According to customer requirements |
CHEMICAL AND STRUCTURAL PROPERTIES | |||
Crystal Structure | tetragonal, 42m | ||
Lattice Parameter | a=b=5.467Å, c=12.736Å | ||
Melting Point | About 1040°C | ||
Mohs Hardness | 5.5 | ||
Density | 4.17 g/cm3 | ||
Thermal Conductivity | 35.89 W/mK | ||
Thermal Expansion Coefficients | β‖,5×10-6/K; β⊥,7.8×10-6/K | ||
OPTICAL AND NONLINEAR OPTICAL PROPERTIES | |||
Transparency Range | 0.74 – 12 um | ||
SHG Phase Matchable Range | 3177∼10357nm (Type I) | ||
Absorption Coefficients | α<1.25px-1 @2050-2100 nm | ||
Angular Acceptance | 30°（2um~12um） | ||
NLO CoefficientsNLO | D36=68.9pm/V (at 10.6um) =75.0 pm/V (at 9.6 um) | ||
Non-vanished NLO Susceptibilities | d36=75 ± 8 pm/V | ||
Type Ⅰ deeo=d36 sin2θcos2φ | |||
Type Ⅱ doeo=deoo=d36 sinθsin2φ | |||
Sellmeier Equations (λ in μm) | no2(λ) = 4.64467+5.10087/(λ2-0.13656)+4.27777λ2/(λ2-1653.89) | ||
ne2(λ) = 4.71539+5.26358/(λ2-0.14386)+2.37310λ2/(λ2-1000.82) | |||