Formula：Y2.93Sc1.43Ga3.64O12
Density：5.67 g / cm3
Hardness (Moh)：8
Chamfer：45 deg ±5 deg
Parallelism：30 arc seconds
Perpendicularity：5 arc minutes
Surface Quality：10 - 5 scratch-dig
Wavefront Distortion：1/2 wave per inch of length
YSGG (Yttrium Scandium Gallium Garnet) doped with Chromium and Erbium provides an efficient laser crystal for generating 2.8 micron light in an important water absorption band.
Advantages of Cr, Er: YSGG
Lowest threshold and highest slope efficiency of common Erbium doped crystals(1,2)
Can be flash lamp pumped via Cr bands or diode pumped via Er bands
Operates CW, free-running or Q-switched
The intrinsic crystal disorder increases pump line widths and tenability
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