HOME Products Laser Crystals Cr4+:YAG Crystal

Cr4+:YAG Crystal

  Applications Mostly used in passively Q-switching diode pumped or lamp pumped passive Q-switching materials.  
  Features Chemical stability  
    UV resistant  
    Good thermal conductivity  
    High damage threshold (> 500 MW/cm2  
    Absorptions wavelength of 900nm--1200nm  
    Peak of around 1060nm with large absorption section  
Main Specification Material Chromium doped yttrium aluminum garnet  
Cr4+ dopant concentration 0.5 mol% ~ 3 mol%  
Diameter 2×2 ~ 14×14mm Length 0.1 ~ 12mm  
Dimensional Tolerance (W±0.1mm) × (H±0.1mm) × (L + 0.2mm/-0.1mm)  
Angle tolerance Δθ<±0.5°; Δφ< ±0.5°  
Coating AR coatings reflectivity <0.2 % @ 1064 nm  
Orientation [100]+/-10°  
Initial transmission 10% ~ 99%  
Wavefront Distortion < λ/8 @ 633nm  
Surface quality  Scratch/Dig 10/5 Scracth/dig per MIL-O-13830A  
Parallelism <20 arc seconds  
Perpendicularity 5 arc min  
Surface flatness  <λ/10 @ 632.8 nm  
Clear aperture > 90% central area  
Chamfer <0.1 mm × 45°  
Damage Threshold 500 MW/cm2  
Physical and Chemical Properties Chemical Formula Cr4+:Y3A15O12  
Crystal Structure Cubic garnet  
Dimensional tolerances +0/-0.1 mm  
Recovery time 8.5μs  
Density 4.56g/cm  
Mohs Hardness 8.5 Mohs  
Refractive Index 1.82 @ 1064nm  
Thermal Conductivity 12.13w/m/kv  
Optical properties Base state absorption cross section σs1=4.3x10-18cm2  
Emission state absorption cross section σs2=8.2×10-19cm2  
Fluorescent Lifetime 3.4μs