For all UV-VIS-NIR applications and ATT-INL-EXT setups where light intensity must be reduced, Avantes offers the inline fibre-optic attenuator (ATT-INL-EXT) and the direct attached fibre-optic attenuator (ATTDA). This device is an iris attenuator which controls light throughput to avoid detector saturation.
The ATT-INL-EXT is coupled between two SMA terminated fibre-optic cables, whereas the ATT-DA can be connected directly to the light source. Both devices consist of two UV/VIS/NIR collimating lenses mounted on either side of an adjustable iris. The attenuation can be set from 0-100% and can be fixed with a set screw.