Ultra-high-reflection mirrors (UHR)

Mirrors with a reflectivity exceeding 99.99% are at the limits of current coating developments. Our magnetron sputtering facility offers the best technology for ultra-high reflection mirrors due to the extremely dense layers. More than 99.997% reflection over a bandwidth of 200 nm or more is achievable.

Characterization of these mirrors is performed in a cavity ring-down measurement device with ppm-level precision.

Broadband ultra-high reflection mirrors cover bandwidth of more than 200 nm

Please browse UFI’s design database for the following examples:



  • High-finesse cavities for cw laser stabilization and efficient frequency conversion
  • Enhancement cavities for pulsed lasers

Related reading

  • H. Carstens et al Optics Express, Vol. 21, Issue 9, pp. 11606-11617 (2013)
  • M. K. Trubetskov et al. Optics Express 18, 27613-27618 (2010);

Please contact us for further information and references.