1986 Fiscal Year Final Research Report Summary
Detection of molecules by the resonant Voigt effect spectroscopy
| Project/Area Number |
60550018
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
物理計測・光学
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
YAMAMOTO Manabu Tokyo University of Agriculture and Technology, 工学部, 教授 (60166824)
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| Co-Investigator(Kenkyū-buntansha) |
TAKUBO Yoshitaka Tokyo University of Agriculture and Technology, 工学部, 助教授 (10015109)
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| Project Period (FY) |
1985 – 1986
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| Keywords | Voigt effect / Laser spectroscopy / High-sensitivity spectroscopy / Molecular spectroscopy / Zeeman effect / Magneto-optic effect / Dye laser / OH分子 |
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| Research Abstract |
The resonant Voigt effect (optical anisotropy induced in a transverse magnetic field) was investigated for OH radicals in a flame with a narrow-band dye laser as a light source. Elliptically polarized light was tuned to the <Q_1> (1) and <Q_(21)> (1) lines in the electronic transition band <A^2> <SIGMA^+> (v'=1)- <X^2> <PAI_i> (v"=1). The light polarization after passing through the flame was analyzed with an angle-offset birefringent prism. The measured profiles of the Voigt effect signal were interpreted on the basis of the molecular Zeeman effect. By adjusting the light ellipticity and the analyzer offset angle, the signal to noise ratio (SNR) of the Voigt effect was improved over the estimated absorption SNR by a factor of <about> <10^2> in the detection of the above lines. This technique offers an alternative method of molecular spectroscopy.
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