High Reflective Coating

High Reflective Coating

Dielectric Coating provides high reflectance over a broad bandwidth. Ideal for a tunable laser or in white light applications, used in 250nm~2200nm. It is generally used in single wavelength laser cavity where the lowest cavity loss at a center wavelength is essential.

 

Metallic High Reflection Coating

Metallic High Reflection Coating is mainly practiced using Au, Ag, Cr, or Ni-Cr. This kind of coating is applied to the situation where a consistent high reflection on a wide spectral range is needed. Their reflectance is lower than that of dielectric HR coating, but their spectrum can cover near-UV, visible and near-IR. Dielectric coating is applied on the layer of metallic coating to prevent metallic coating from oxidization.