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Co2+:MgAl2O4 ( Co2+:Spinel) Crystals
High absorption cross section
  • Fit for laser wavelength range 1.2 ~ 1.6μm
  • Excellent for 1.54μm Erbium doping lasers
  • High contrast Q-switch Inquire Us  
  • Specifications:

    Material Co2+:MgAl2O4 Orientation <111>+/-0.5°
    Doping Rate of Co2+ 0.05-0.3 atm% Optical Density 0.1-0.9
    Optical Density 0.1-0.9 Absorption Coefficient 1.0cm-1-7cm-1
    Transmittance 30%-99% Absorption Section 3.5 x 10-19cm2
    Thickness/Diameter Tolerance +/-0.1mm Parallelism 10″
    Perpendicular 5′ Surface Quality 10/5
    Wavefront Distortion Lambda/8 @ 632nm Flatness Lambda/8 @ 632nm
    Aperture >90% Chamfer 0.1 x 45°
    HR Coating ≦0.2%(@ 1533nm) Damage Threshold >500MW/cm2

    Co2+:MgAl2O4 (Co2+:Spinel or Co:MALO) crystal is a new material for passive Q-switching in lasers emitting from 1.2 to 1.6 µm, in particular, for eye-safe 1.54 µm Er:glass laser, but also works at 1.44 µm and 1.34 µm wavelengths. High absorption cross section (3.5 × 10-19cm2) permits Q-switching of Er:glass laser without intracavity focusing both with flash-lamp and diode-laser pumping. Negligible excited-state absorption results in high contrast of Q-switch, i.e., the ratio of initial (small signal) to saturated absorption is higher than 10.

    Shanghai North Optics offers high-quality Co:Spinel crystals materials with high optical quality and uniform distribution of Co2+ in laser-grade polishing and coatings.