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Updated: Jun 10, 2026

High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
Published on: December 22, 2015
Specular integrating tube for scattered-light spectroscopy
Robert L Lucke1, Jacob Grun, Charles Manka
1Code 7231, U.S. Naval Research Laboratory, Washington, District of Columbia 20375, USA. robert.lucke@nrl.navy.mil
Abstract:
A cylindrical sample cell is adapted to the problem of increasing the scattered-light signal from an optically thin liquid sample. The ends of the cylinder are coated with specularly reflecting aluminum to increase the signal by reflecting the stimulating light beam through the medium multiple times. The circumference of the cylinder is similarly coated to increase the fraction of the emitted light that is collected and sent into the slit of a spectrometer. Such a cell can greatly increase the signal measured by an analysis system without any modifications to the system.
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