Cr: ZnSe(Chromium Zinc Selenide) – Laser Crystal – Gain Medium – Customized products

Product ID: 6577


Cr: ZnSe(Chromium Zinc Selenide) – Laser Crystal – Gain Medium – Customized products

Cr: ZnSe laser crystal has the advantages of normally no excited state absorption and upper-level conversion, an extremely broad absorption band and large emission cross-section, superb fluorescence quantum efficiency at room temperature and extra broad emission width as well as good chemical and mechanical properties, which make it become an excellent source of efficient and powerful tunable mid-infrared laser. Because of mid-infrared wavelength band is the window of atmosphere, the Cr: ZnSe laser crystal has important application prospect in the field of photo-communication, pollution gas detection, industrial combustion product test and so on.

$100 is a deposit, not the final price of the product. Please contact us for price if needed.


Broad tunability (lasing from 2.1-3.1 μm)
Broad absorption bands
Large gain cross section (σemission ~ 9 × 10-19 cm2)
Minimal problem of excited state absorption (no spin-allowed excited state transitions from the upper laser level)
High thermal conductivity − better than YAG (18 W/m·K in ZnSe versus 13 W/m·K in YAG)
High IR (0.6-20 μm) transparency

Material Specifications

Crystal Structure Cubic
Poisson Ratio 0.28
Thickness/Diameter Tolerance ±0.05mm
Orientation Tolerance < 0.5°
Flatness <λ/8@632nm
Wavefront Distortion <λ/4@632nm
Surface Finish 10-5(MIL-O-13830A)
Parallelism 30”
Perpendicularity 15ˊ
Clear Aperture >90%
Chamfer <0.2×45°
Melting Point 1520 ºC

Physical and Chemical Properties

Thermal Expansion Coeff. @20ºC 1.5×10-6/ºC
Thermal Conductivity Coeff. @20ºC 14 W/m/ºK
Specific Heat 0.79 J/g K
Density 5.27 g/cm³
Durability Knoop Hardness 112 kgf/mm²
Mohs Hardness 8.5
Young’s Modulus 67 GPa
Modulus of Rupture 55 MPa
Orientation <111>or <100>

Optical and Spectral Properties

Laser Wavelength 2150 – 2600 nm
Emission Linewidth <1 nm
Emission Linewidth 9×10-19 cm²
Intrinsic Loss @1064nm <0.003 cm-1
Refractive Index (n) @ 1650nm 2.455
Thermal Optical Coeff. (dn/dT) @nm  61×10-6/ºC


Absorption and Emission Spectra

TaorLab laser crystals

Category: Tags: ,