Laser Crystals: Cr4+:YAG
Cr4+:YAG (Y3Al5O12) (Chromium Doped Yttrium Aluminum Garnet ) is an ideal material for passive Q-switching of Nd:YAG and other Nd and Yb doped lasers in the wavelength range of 0.8 to 1.2 mm. One of the remarkable features of Cr4+:YAG is high damage threshold (better than 500 MW/cm2). Passive Q-Switching is preferred for simplicity of manufacturing and operation, low cost and reduced system size and weight.
|Crystal Structure||Cubic garnet|
|Recovery time||8.5 μs|
|Thermal conductivity||12.13 W/m/K|
|Refractive index||1.82 @ 1064nm|
|Ground state absorption cross section||σs1=4.3×10-18cm2|
|Excited state absorption cross section||σs2=8.2×10-19cm2|
|Fluorescence lifetime||3.4 μs|
We offer Cr:YAG Specifications
|Orientation:||The rod axis is along  within5°, and  within5°|
|Cr4+ concentration:||0.5 mol% ~ 3 mol%|
|Aperture||2×2 ~ 20×20 mm|
|Length:||0.1 ~ 12 mm|
|Initial transmission:||5% ~ 99%|
|Angle tolerance:||Δθ< ± 0.5°; Δφ< ±0.5°|
|Flatness:||λ /8 @ 633 nm|
|Parallelism:||20 arc sec|
|Perpendicularity:||5 arc minutes|
|Surface finishing:||20/10 scratch/dig to MIL-O-13830A|
|Wavefront distortion:||less than λ/8 @ 633 nm|
|Coating||AR/HR/PR coating upon customer’s request|
Note: When ordering Cr4+:YAG crystal, please specify the aperture, initial transmission(To) and coatings.
Cr:YAG crystals with various ion doped YAG diffusion bonded are also available from us.