Raman Spectroscopy

Optical filters are key components for highly sensitive Raman spectroscopy applications. Emitted Raman wavelengths are often extremely close to the laser excitation line and only the highest performance optical filters can be used to discriminate between the laser line and resultant Raman signal to be processed. Laser blocking filters (longpass, shortpass or notch), laser clean-up filters (narrow bandpass) and dichroic beam-splitters are available for all laser wavelengths between 260 nm and 1550 nm. The filter performance is realized by all-dielectric hard coatings deposited onto a single substrate, so there is high flexibility for the filter dimensions as required by compact optical set-ups.