Trichroid Thin Film Polarisers

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Laser Components has developed trichroid thinfilm polarisers (TFPs), which make it possible to simultaneously separate the polarisation of three wavelengths.

These optics have excellent reflectivity for s-polarisation in blue (450nm), green (520nm) and red (640nm) light, with p-polarisation being almost completely transmitted. These TFPs may be used to combine linearly polarised laser beams from different sources of the same or different wavelength, or conversely to separate unpolarised light at three wavelengths into the two polarisations.

This complex and challenging design is produced using the firm’s ion beam sputtering facility, which enables particularly compact layer structures with good reflectivity.