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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

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.

Get in touch for more details and to request a quote.

Plate beamsplitter diagram©️ G&H

Plate Beamsplitters

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.


Selection of the appropriate beamsplitter design is dependent upon several factors:

  • Polarizing or non-polarizing
  • Non-polarizing beam ratio (examples: 50-50, 70-30, 90-10)
  • Wavelength separation
  • Power handling (high power or high incident laser energy)
  • Ghost reflection tolerance
  • Beam displacement tolerance
  • Cube or plate


Wavelength ranges240 nm to 5000 nm240 nm to 5000 nm
Dimensions5 - 150 mm diameter5x5x5 mm - 50x50x50 mm typical
Beamsplitting optionsPolarizing or non-polarizingPolarizing or non-polarizing
Beam ratios from 90-10 to 50-50Beam ratios from 90-10 to 50-50
Wavelength separationWavelength separation
Long pass or short passLong pass or short pass
Coating optionsE-beam dielectric optimized for LIDTE-beam dielectric optimized for LIDT
Back surface AR coating to minimize ghosting
Low phase shifting coating designs
Assembly optionsCemented
Optically contacted
Country of manufactureUKUK

G&H has received IS09001 certification across all of its manufacturing sites while AS9100C certification has been achieved at select facilities.

G&H Precision Optics Brochure

Download our Precision Optics Products & Solutions Guide


From high transmission broadband anti-reflection coatings to V-coats for high energy applications, our extensive coating capabilities for precision optical components deliver performance across the spectrum from the UV to the FIR. Take a closer look at our optical coatings service.


We have made a significant investment in metrology equipment to ensure that our customers receive quality, high-performing precision optical components. More details on our metrology capabilities can be found on our metrology page.

Environmental testing

Environmental testing of components and coatings is critical for the assurance of performance in rugged conditions. G&H environmental testing capabilities include MIL-C-675C, MIL-C-48497A, MIL-E-12397, and MIL-M-13508C for endurance against abrasion, adhesion, humidity, temperature, and environmental conditions.

Product enquiry

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