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Investigation of optical mixing Albach, Gary George
Abstract
The effect of mixing two intense ruby laser beams in a plasma and in a gas has been investigated by means of light scattering. In both media, large density modulations are shown to exist in the field of the two mixed beams. With plasma, light scattered coherently from a third beam has been observed with intensities of over 100 times that scattered by incoherent thermal fluctuations. Similar enhanced scattering is observed in gases over the normal Rayleigh value. As indicated by the wavevector distribution, the mixed electromagnetic waves produce a stationary density wave in the medium. For gases the dependence of density amplitude on power in the mixed beams and on the gas pressure has been investigated and the results compared to a simple theoretical model. The results indicate that the magnitude of the density modulations saturates with both increasing gas pressure and increasing laser power. A threshold for observation of the density modulations with increasing laser power is also noted in carbon dioxide.
Item Metadata
Title |
Investigation of optical mixing
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1975
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Description |
The effect of mixing two intense ruby laser beams in a plasma and in a gas has been investigated by means of light scattering. In both media, large density modulations are shown to exist in the field of the two mixed beams. With plasma, light scattered coherently from a third beam has been observed with intensities of over 100 times that scattered by incoherent thermal fluctuations. Similar enhanced scattering is observed in gases over the normal Rayleigh value. As indicated by the wavevector distribution, the mixed electromagnetic waves produce a stationary density wave in the medium. For gases the dependence of density amplitude on power in the mixed beams and on the gas pressure has been investigated and the results compared to a simple theoretical model. The results indicate that the magnitude of the density modulations saturates with both increasing gas pressure and increasing laser power. A threshold for observation of the density modulations with increasing laser power is also noted in carbon dioxide.
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Genre | |
Type | |
Language |
eng
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Date Available |
2010-02-01
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0084860
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.