• Title/Summary/Keyword: Optical pumping

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Bouble Resonance Optical Pumping in the Transition 5S1/2-5P3/2-4D3/2, 5/2 of Rb Atoms (루비듐 5S1/2-5P3/2-4D3/2, 5/2 전이선에서의 이중공명 광펌핑 분광)

  • Moon, H.S.;Lee, L.;Kim, J.B.
    • Korean Journal of Optics and Photonics
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    • v.16 no.4
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    • pp.297-303
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    • 2005

  • We present the double resonance optical pumping(DROP) spectra according to the laser power, the polarization combination of lasers, and the alignment of lasers in the transition $5P_{3/2}-4D_{5/2}\;and\;5P_{3/2}-4D_{5/2}$ of $^{87}Rb.$ We observed obviously changing DROP spectrum according to the laser power in the transition $5P_{3/2}-4D_{5/2}$ involved the cycling transition. The laser power effects are attributed to the low optical-pumping-effect in the cycling transition. We observed changing DROP spectrum depending on the polarizations of the lasers. The laser polarization effects are attributed to the changing transition probability according to the polarizations of lasers. We compared the co-propagation with the counter-propagation and the spectral linewidths were 12.2 MHz and 6.9 MHz, respectively.

  • https://doi.org/10.3807/KJOP.2005.16.4.297 인용 PDF KSCI

Spectroscopic Analysis of Gain Bandwidth in Raman Amplifier with Multiwavelength Pumping Scheme Using Actual Band Model

  • Felinskyi, Georgii;Han, Young-Geun;Lee, Sang-Bae
    • Journal of the Optical Society of Korea
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    • v.8 no.4
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    • pp.156-162
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    • 2004

  • The spectroscopic model is proposed to analyze the gain bandwidth of a fiber Raman amplifier (FRA) with a multiple wavelength pumping scheme based on Raman gain theory. The oscillatory lineshape, which is the analytic function to analyze Raman gain spectra, allows us to estimate the gain bandwidth of the FRA. Based on the proposed theoretical modeling, we design and analyze the characteristics of the FRA using the combined multiwavelength pumping sources. We achieved the extended gain bandwidth of the FRA over 80 nm with the small gain ripple less than 0.5 dB. Threshold pumping power and effective noise figure for the FRA can be also analyzed by using the proposed model, which is also applicable for versatile fibers with other doping materials. The proposed analysis method can be useful for the design of FRA with the multiwavelength pumping scheme.

  • https://doi.org/10.3807/JOSK.2004.8.4.156 인용 PDF KSCI

Production of Hyperpolarized 129Xe Using Spin Exchange Optical Pumping

  • Kavtanyuk, Vladimir Vladimirovich;Kim, Wooyoung;Ando, Yu;Chebotaryov, Sergey;Seon, Yonggeun;Tan, Joshua Artem
    • Journal of the Korean Physical Society
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    • v.73 no.10
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    • pp.1458-1465
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    • 2018

  • We present a constructed setup for polarizing $^{129}Xe$ noble gas. Hyperpolarized $^{129}Xe$ has been obtained via spin exchange with an optically pumped rubidium vapor. Optical pumping is based on polarizing the valence electron of rubidium by the resonant absorption of a circularly polarized laser light. The magnetic field of 30 G was used for obtaining $^{129}Xe$ polarization. The apparatus for detecting polarization is a nuclear magnetic resonance spectrometer. The highest $^{129}Xe$ polarization of 54% has been obtained using 60 W circularly polarized laser light with wavelength of 794.7 nm. The measured longitudinal relaxation time of the hyperpolarized $^{129}Xe$ was 72.3 minutes.

  • https://doi.org/10.3938/jkps.73.1458 인용 KSCI