A high-throughput Raman notch filter set

G.J. Puppels, A. Huizinga, H.W. Krabbe, H.A. de Boer, G. Gijsbers, F.F.M. de Mul

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A chevron‐type Raman notch filter (RNF) set is described. lt combines a high signal throughput (up to 90% around 1600 cm−1 and ≳80% between and 700 and 2700 cm−1) with a laser line suppression of 108–109. The filter set can be used to replace the first two dispersion stages in triple‐stage Raman monochromators commonly employed in multichannel detection systems. This yields a gain in intensity of the detected Raman signal of a factor of 4. It is shown that in Raman spectrometers with a backscatter geometry, the filter set can also be used to optically couple the microscope and the spectrometer. This leads to a further increase in signal intensity of a factor of 3–4 as compared to the situation where a beam splitter is used. Additional advantages of the RNF set are the fact that signal throughput is almost polarization independent over a large spectral interval and that it offers the possibility to simultaneously record Stokes and anti‐Stokes spectra.
Original languageEnglish
Pages (from-to)3709-3712
Number of pages4
JournalReview of scientific instruments
Issue number12
Publication statusPublished - 1990

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    Puppels, G. J., Huizinga, A., Krabbe, H. W., de Boer, H. A., Gijsbers, G., & de Mul, F. F. M. (1990). A high-throughput Raman notch filter set. Review of scientific instruments, 61(12), 3709-3712. https://doi.org/10.1063/1.1141963