Fixed attenuator 990-007 series

compactbeamvariable

Compact Variable Attenuators designed to continuously attenuate linearly polarized laser beams. Clear aperture ⌀17 mm or ⌀22 mm. Models for fixed wavelengths from 257 nm to 1064 nm available, other wavelengths are available upon request. This manual variable attenuator series is designed to continuously attenuate linearly polarized laser beams. They feature precision opto-mechanics and high-LIDT optical components incorporated in a compact housing to ensure stable and reliable performance. Attenuators are based on a Brewster-type thin film polarizer fixed at 56° and a quartz waveplate. The polarizer's angle of incidence can be manually adjusted to achieve the best contrast or to manipulate the direction of the reflected s-polarized beam. The waveplate is housed in a 360° continuous rotation mount, which can be manually rotated to control the output power of the transmitted and reflected beams. The intensity of either beam or their intensity ration can be controlled over a wide dynamic range without alteration of other beam parameters. Pure p-polarization could be selected for maximum transmission, or pure s-polarization for maximum reflection. The s-polarization exit port can be blocked with a removable low-power dumper which absorbs laser power up to 5 W. External beam dumps are recommended for high-power applications.