Rubidium-87 Isotope Rubidium-87 Reference Cells

The Photonics Technologies Rubidium-87 Reference Spectroscopic Cells are available in Pyrex and Quartz with high-purity Rubidium-87 filling.

The Rubidium-87 Reference Cells come in a range of sizes, styles, and window materials.

Please see the ‘options’ tab in the table below for more details

Double-side anti-reflective (AR) coated windows are only available on spectroscopic cells made from quartz, with quartz or fused silica windows. The windows are wedged and angled to avoid back reflections along the beam path and undesirable etalon effects. The AR coating centred at 780nm has a wavelength range from 730 to 830nm with a reflectance of less than 0.5%.

Pyrex vapour reference cells are not available with wedged windows, but Pyrex windows can be attached at an angle.

For cells in stock and available for immediate delivery, please click on the ‘delivery’ tab in the table below

Due to the filling material, these cells are classed as Dangerous Goods for carriage by Air. Please contact us for a quote with shipping to your specific location.

If you require a specific cell not listed, please contact us for more information.

Price on Application


Rubidium-87 Quartz Spectroscopy Cells
Description / Part NumberSC-RB87-(19x75-Q)-W+ASC-RB87-(25x75-Q)-AR
Diameter:19mm (2° wedge) 25mm
Optical Path Length:75mm internal length75mm internal length
Windows:Fused Silica (FRIT to body), 3.2mm thickness, 60/40 scratch/dig quality, λ/4 wave flatnessFused Silica (FRIT to body), 3.2mm thickness, 10/5 scratch/dig quality
Window Type:Wedged, 11° angle against bodyFlat, parallel, AR coated windows of 780-795nm range (both faces), λ/10 wave flatness
Rubidium-87 Pyrex Spectroscopy Cells
Description / Part NumberSC-RB87-(25x75-P)
Optical Path Length:75mm internal length
Windows:Pyrex, 1.6mm thickness, 10/5 scratch/dig quality
Window Type: Flat, parallel


4 Weeks

In stock for immediate delivery:

Fused Silica Rb87 Spectroscopy Cell    SC-RB87-(25×75-Q)-AR



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