Concave Super Mirror, High Finesse, Ultra-Low Loss, 25.4 mm, 761-867 nm

Many standard mirrors are offered with high average reflectivity, but these Supermirrors have exceptional absolute reflectivity specifications of greater than 99.97%. We stock theses mirrors making them the highest absolute reflectivity available in a standard catalog optic. These mirrors are ideal when you need every photon. The high finesse coatings have finesse greater than 10,000 and efficiency greater than 10% when used in carefully constructed cavities.

This mirror is superpolised to <2 Å RMS microroughness for ultra-low scatterring. 10-5 scratch-dig is achieved in the center 50% of the clear aperture. This central area is the sweet spot where Fabry pert cavity designs can achieve extremely high finesse.

Newport's proprietary IBS coating technique enables the SuperMirrors to provide the highest absolute reflectivity available as standard mirrors. IBS is a higher energy coating process in which atoms of the coating material can be packed more tightly. The results are very high reflectivity, resistance to environmental changes, and unmatched performance for intra-cavity mirrors which require high finesse.