Beamsplitters allow a single beam to be split into two beams of differing power. The most popular power split is 50:50 at a 45° incidence angle, but other ratios are also available. The polarization needs to be considered when specifying a beamsplitter otherwise the reflected and transmitted beams will not have the correct power.
ULO Optics has a special ‘polarization insensitive’ coating which eliminates this problem for the 50:50 case, reflecting 50% of both S and P polarization. Incident circularly-polarized radiation is split equally into two circularly polarized beams. Germanium is used as one of the coating layers, so the coating is visually opaque, and the beamsplitter cannot be used to split visible pointing-beams. Due to the relatively high level of absorption in the coating, incident intensity levels should not exceed 500 W/cm2 in order to avoid thermal-lensing effects.
Split ratio 50:50 +/- 1%
45 degree incidence angle
Other reflectances and angles of incidence are possible
ULO Optics is an ISO certified company and quality is at the heart of everything we do. With a host of industrial affiliations you can rely on ULO to deliver.
Beam Expanders for 1μm lasers
ULO Optics are excited to introduce our new range of beamexpanders. Designed for low power (500w) lasers such as Nd:YAG and Yb doped fibre lasers operating near the 1μm wavelength. The beamexpanders are of Galillean design and use Multi-spectral Zinc Sulphide for the optics which has an absorption at 1μm of 0.0005cm−1 (Similar to ZnSe at 10.6μm).
ULO Exhibit in Munich
ULO Optics will exhibiting at this year’s Laser World of Photonics exhibition and would like to invite all existing and potential customers to come and visit our stand.
Visit us at Booth # B2 .120 | June 22 -25
ULO Optics develops CO2 Brewster plate beamcombiner
In our new beamcombiner – C-BC-2, pairs of enhanced Brewster Windows are used to attenuate a linearly polarised CO2 laser beam. The Brewster plate acts like a polarising beamsplitter. The difference in reflectance also allows two perpendicular polarised beams to be combined into a single beam.