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Preliminary Investigation of the Vacuum Magnetooptic Effect : Evaluation of the Non-Resonant Magnetooptic Birefringence due to Low-Density Residual Gases

Research Project

Project/Area Number 04640382
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 物理学一般
Research InstitutionTokyo University of Agriculture and Technology

Principal Investigator

YAMAMOTO Manabu  Tokyo University of Agriculture and Technology, Department of Applied Physics, Professor, 工学部, 教授 (60166824)

Co-Investigator(Kenkyū-buntansha) MUROO Kazuyuki  Tokyo University of Agriculture and Technology, Department of Applied Physics, A, 工学部, 助手 (60219954)
TAKUBO Yoshitaka  Tokyo University of Agriculture and Technology, Department of Applied Physics, P, 工学部, 教授 (10015109)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1993: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1992: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsVacuum / Magnetooptic effect / Optical anisotropy / Voigt effect / Semiconductor laser / Polarization analysis / Photon statistical noise / Extinction ratio / 光子統計雑音 / 消光比
Research Abstract

In a preliminary investigation of the vacuum magnetooptic effect, we evaluated the effect of non-resonant magnetooptic birefringence due to residual gases contained in the vacuum cell. We measured the magnetooptic birefringence coefficient of the gas under the atmospheric pressure. We used a semiconductor laser oscillating at 780 nm as a light source. The laser output flux was stabilized to 2X10^<-4>. The extinction ratio of the polarization analyzer was (2-3)X10^<-8>.
Light from the laser was passed through a linear polarizer and a retarding plate to convert the light beam into an elliptically polarized state. We passed the light bean through a cell containing oxygen molecular gas, which was placed in magnetic field of 0.8T.The field was oriented at 45 degrees from the polarization azimuth of incident light and was transverse to the optical path. The polarization change caused by magnetically induced optical anisotropy of oxygen gas was detected with a polarization analyzer.
The measured magnetooptic birefringence of oxygen molecule is expressed by DELTAn=ClambdaB^2, with C=-(5.4(〕SY.+-.〔)0.5)x10^<-15>[G^<-2>cm^<-1>](lambda=780nm, 16゚C, 1 atm.). The constant C for nitrogen and argon is smaller than that fo oxygen. The magnetooptic birefringence of residual gases at pressures above 10^<-10>[Torr] can affect the detection of the vacuum birefringence induced by a magnetic field.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] K.Muroo,Y.Takubo and M.Yamamoto: "Resonant Voigt-effect spectra of the Rb D_2 transition" Optical Society of America Ann.Mtg.Tech.Digest. 23. 11 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] K.Muroo,Y.Takubo and M.Yamamoto: "Resonant Voigt-effect spectrum of the Rb D_2 transition" Journal of the Optical Society of America B. B11(in press). (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] K.Muroo, Y.Takubo, and M.Yamamoto: ""Resonant Voigt-effect spectra of the Rb D_2 transition"" in Optical Society of America Annual Meeting Technical Digest. vol.23. 11 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] K.Muroo, Y.Takubo, and M.Yamamoto: ""Resonant Voigt-effect spectrum of the Rb D_2 transition"" J.Opt.Soc.Am.B.vol.B11 (in press). (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] K.Muroo,Y.Takubo and M.Yamamoto: "Resonant Voigt-effect spectra of the Rb D_2 transition" Optical Society of America Ann.Mtg.Tech.Digest. 23. 11 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] K.Muroo,Y.Takubo and M.Yamamoto: "Resonant Voigt-effect spectrum of the Rb D_2 transition" Journal of the Optical Society of America B. B11(in press). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] K.Muroo et al.: "Resonant Voigt-effect spectra of the Rb D_2 transition" OSA Annual Meeting Technical Digest,1992(Opt.Soc.Am.). 23. 11- (1992)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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