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Integrating Spheres

Gold and polymer integrating spheres for laser applications.

We offer Ulbricht spheres made from a special polymer suitable for the wavelength range 250nm – 2.5 µm. For longer wavelengths in the range 700nm – 20 µm, a gold coating on a rough, metallic surface is used.

Since lasers in this spectral range are usually also high power, we use solid copper as a thermally conductive substrate material.

By choosing the size of the integrating sphere, the overall sensitivity of the system can be adjusted. In addition, the detector is independent of inhomogeneities in power density and polarization.

The detector is also independent of the incidence location and angle of the laser radiation.

High power measurements are often performed using thermopile detectors.

Thermopiles however, have the disadvantage of reacting very slowly – typical risetimes leading to measurement periods of 1 second at best.

The combination of an integrating sphere and a photodiode based power meter opens the possibility of measuring high power fluctuations on a µs time scale.


Our polymer integrating spheres are machined from solid material – not coated. The robust devices are perfect for measuring laser power in the visible to NIR.

We offer a wide range of sizes from 10mm to 100mm. The smaller sizes are compatible with our OPM150 series of power meters.Just plug it in to your USB port and start measuring!

Specifications Polymer

  • Fibre ports: SMA and FC

  • Photodiodes: Si, Ge, InGaAs, VIS-enhanced InGaAs, IR-extended InGaAs

  • Sphere inner diameters: 10mm, 20mm, 50mm, 100mm


The gold integrating spheres are designed for high power applications in the near to mid infrared (NIR and MIR).

These quality spheres provide exceptional power handling capability with air cooled and liquid cooled versions to choose from.

Specifications Gold

  • SMA fibre ports

  • Standard 2 port design (eg: Power and spectrometer). Four ports on request.

  • Power density: 5000W/cm²

  • Wavelength range: 650nm – 20 µm
Contact Steve

Dr. Steven Wright


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Anja Weets


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Rolf Jaspers