• Nd-Concentration : 0.7% atomic concentration of Nd3+ ions
• Orientation : [111] crystalline direction (+/-5 deg)
• Extinction ratio : 25dB between crossed polarizer in collimated He-Ne laser beam
• Wave front distortion : <0.1 wave/inch of rod length @ 633nm (for a plane wave passing twice through the crystal)
• Scattering loss : Not more than 0.2% cm-1
• Crystal Perfection : Free of impurities visible to the naked eye.
Free of Bubbles, inclusion, scattering sites as viewed in white focused illuminator light under crossed polarizes.
• End surface finish
# Flatness : 0.1 wave @ 632.8nm
# Scratch & dig : 20 – 10
• Barrel finish : Ground 55(±10) micro inch
• End face configuration : Flat/Flat, Cut parallel to each other with in 10 arc sec.
• Chamfer : 0.005(±0.003) inch depth, 450(±50) Angle.
• End coating : Hard damage resistant AR Coating with <0.25% reflectivity at 1.064 mm wavelength.
• Coating damage threshold: Not less than 1GW/cm2 for 10nsec pulse