Optimized beamsplitter designs demonstrating superior laser damage performance for each unique wavelength, split, and incident angle combination. High-energy coatings are optimized to accommodate specific application requirements.

For maximum power handling, we recommend optically contacted cubes or plate beamsplitters. For durability and handling, we suggest cube beamsplitters.

We design and manufacture our beamsplitters, by hand, in the United Kingdom.

Cube beamsplitters can divide the incident beam based on polarization (S or P) or power (ratio of energy into each arm). The S and P polarization components are separated by reflecting the S component at the dielectric beamsplitter coating while the P component passes through the cube.

Alignment markings on the cubes ensure correct placement in the optical path. Beamsplitting cubes are easy to mount and mechanically durable. Our cube beamsplitters may be provided cemented, optically contacted, or even air-spaced. For some applications, higher power handling and lighter weight is required.

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Plate varieties are preferred in high laser energy applications, or where cost or weight limits on the assembly come into play. They are typically designed to work at 45° angles, though other angles can often be specified.

There are two trade-offs for the convenience of the plate beamsplitter:

• The physics of the plate component generates a beam offset of the secondary beam. This offset distance is dependent upon the thickness of the substrate.
• A ghost beam is generated by the reflection of the secondary beam as it encounters the back surface of the substrate. An anti-reflection coating on the exit surface of the substrate can minimize the ghost beam.