Doe Tuner and Beam Expander

Holo/OR’s diffractive optical elements are mainly used for high-power laser beam shaping and splitting. The specifications provided are only valid for one optical assembly.

In many cases, the use of these elements is economical, despite their limited variability; however, a better variability is demanded. Laser Components now introduces two new accessory products to the market: Holo/OR‘s Doe Tuner and the Beam Expander.

The Doe Tuner is a variable beam expander with a zoom range between 0.8 and 1.2. If the Doe Tuner is placed before a diffractive TopHat element in the beam path, the smallest ideal spot can be finely adjusted; when placed before multi-spot elements, the spot size can be adapted – without affecting the distance between the spots.

When placing the Tuner behind the Doe and before a focusing lens, the spot size can be adjusted in beam shaping elements; in multi-spot elements, the spot size can be adjusted in combination with the distance between the spots.

The Beam Expander is used similarly to the Doe Tuner. Instead of a zoom range, it has fixed zoom levels. The Beam Expander is available in two versions: five times or ten times the magnification. It was optimized for applications in combination with square TopHats and 2-D beam splitters.

Both lens systems feature very small wavefront errors and are especially suited for high-power applications.