Superpolished Sapphire to < 1Å RMS
Once our customers found out that we can polish and measure fused silica surfaces to < 1 angstrom in RMS surface roughness, they immediately asked us if we could do the same thing on sapphire. Within just a few weeks we were able to refine our polishing and cleaning processes to achieve similar surface quality on not just sapphire (shown here), but Ti:sapphire and TGG crystal as well.
Super-polished or laser quality polished substrates and assemblies are ideal for use as low-loss laser mirrors, high energy waveguides and in cavity ring-down spectroscopy (CRDS) where thermal stability, surface scatter and high laser damage thresholds are key requirements.
