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The Utilization of a Holographic Bragg Diffraction Filter for Rayleigh Line Rejection in Raman Spectroscopy

Volume 44, Number 9 (Nov. 1990) Page 1558-1561

Carrabba, Michael M.; Spencer, Kevin M.; Rich, Chris; Rauh, David

Raman spectra have been observed to within less than 200 cm−1 of the Rayleigh line through the use of a holographic Bragg diffraction (HBD) filter. The HBD filter has a very high optical density (5.8 OD) while maintaining a relatively high and flat transmission in the region > 200 cm−1. Utilization of an HBD filter allowed the observation of Raman spectra with a compact 0.125-mm spectrograph. Spectra of solid, liquid, and surface-enhanced Raman (SER) samples have been demonstrated with the HBD Raman system.