4Lasers variable reflectivity mirrors provide a circularly symmetric reflectance profile according to the super-Gaussian function with order of 2. These mirrors are favorable in high-power unstable laser resonators for their wide filling of the active medium and weak diffraction on hard-edge aperture. Therefore, super-Gaussian variable reflectivity mirrors contribute to better near- and far-field beam quality. It is worth to mention that variable reflectivity mirrors can be designed to have various reflectance profiles, such as linear, parabolic, Gaussian.

Main features

■ Mirror substrates fabricated from high-quality UV grade fused silica

■ Standard substrate dimensions are ø25,4 x 5 mm

■ Central reflectance from 15% to 35% at 1064 nm wavelength

■ Custom reflectance profiles, substrates material and dimensions are available upon request