Non-polarizing optical laser beam-splitter
Optosigma Corporation
* All-dielectric coatings optimized to be insensitive to polarization at design wavelengths
* BK7 cube material - polished to λ/4
* Available in a range of laser wavelengths
* Highest performance - negligible absorption
* 5mm beamsplitter cubes available for fiber optic applications
* Standard cubes from 5 to 20mm
The all-dielectric coatings for these cube beamsplitters are largely insensitive to the polarization state of the incoming beam. The coatings have been designed to hold both the s- and p-polarization components to the same ratio of reflection-to-transmission over a specific laser wavelength region. The graph shows a typical reflectivity curve for the 633nm wavelength. At all the design wavelengths the s-reflectance equals the p-reflectance within ±3%, while both the reflectance and the transmittance equal 50% within ±5%.
