KD*P crystal Jun 4, 2012

Deuterated potassium dihydrogen phosphate (KD2PO4) or DKDP single crystals are widely used in non-linear optics as the second, third and fourth harmonic generators for Nd:YAG and Nd:YLF lasers. They are also found in electro-optical applications as Q-switches for Nd:YAG, Nd:YLF, Alexandrite and Ti-sapphire lasers, as well as for Pockels cells.
Process parameter
 Tolerance: ±0.1mm
 Angle tolerance: 10 arc minutes
 Scratch/Dig code: better than 20/ 10 to MIL-PRF-13830B
 Flatness: less than λ/8 @ 633nm
 Clear aperture: central 90% of the diameter
 No visible scattering paths or centers when inspected by a 50mW green laser
 Parallelism: better than 15 arc seconds
 Perpendicularity: ≤10 arc minutes
 Chip: ≤0.1mm
 Chamfer: 0.2-0.4mm@45°

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