A Brillouin gain spectrometer and its evaluation by the study of some liquids

Thesis (M.Sc.)--Memorial University of Newfoundland, 1994. Physics Bibliography: leaves 65-68 The construction and testing of a Brillouin gain spectrometer is discussed. The spectrometer employs a high power (150 mW) tunable dye laser and a low power (1.7 mW) stabilized HeNe laser in a pump-probe ar...

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Bibliographic Details
Main Author: Fan, Chunxia
Other Authors: Memorial University of Newfoundland. Dept. of Physics
Format: Thesis
Language:English
Published: 1994
Subjects:
Brillouin scattering
Spectrometer > Evaluation
Liquids > Spectra
Newfoundland studies
University of Newfoundland
Online Access:http://collections.mun.ca/cdm/ref/collection/theses3/id/139151
Description
Summary:Thesis (M.Sc.)--Memorial University of Newfoundland, 1994. Physics Bibliography: leaves 65-68 The construction and testing of a Brillouin gain spectrometer is discussed. The spectrometer employs a high power (150 mW) tunable dye laser and a low power (1.7 mW) stabilized HeNe laser in a pump-probe arrangement Because of the small signal gain (1 x 10-5), several noise reduction schemes were used to enhance the signal to noise ratio. The spectrometer was evaluated by studying the strongly scattering liquid CS2 and the weakly scattering liquid CC14. Brillouin shifts and linewidths were accurately determined for both liquids. The high resolution of this instrument permitted measurement of the small asymmetry in the measured lineshapes. In CC14 we were able to observe the so-called Mountain mode and to confirm that CC14 can be modeled as a liquid exhibiting a single relaxation time.

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