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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
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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) crystals 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.

Hangzhou Shalom EO offer the high quality Co:Spinel crystals materials with high optical quality and uniform distribution of Co2+ in laser grade polishing and coatings. 

Diffusion Bonding Laser Crystals

Diffusion Bonding Laser Crystals

  • Decreasing thermal lens effect
  • Increasing efficiency and damage threshold
  • Improving beam quality
  • Compact size