These optically function in the same way as the attenuators, but do not have the rotatable internal barrel.
The unit is positioned in linearly polarised beam and bodily rotated for maximum transmission and locked in place. The outgoing beam has to be converted to circular polarisation after the reflection isolator. Any reflected power for the target will pass through the circular polariser again and be converted back to linear polarisation. However, the backward beam will be polarised perpendicular to the outgoing beam and therefore dumped by the reflection isolator. In most cases above 100W water-cooling is advised.
Dimensions: see drawing
Power Rating: ≤1kW
Cooling: Water-cooled, 6/4 connector
Mechanics: Aluminium Alloy, Black Anodised
Fitting: M50x1.0, female, both ends
Optics: Lasergrade ZnSe Brewster Plates