• 제목/요약/키워드: optical pumping

검색결과 154건 처리시간 0.026초

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

  • 문한섭;이림;김중복
    • 한국광학회지
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    • 제16권4호
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    • pp.297-303
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    • 2005

  • 우리는 $^{87}Rb$ 원자의 $5S_{1/2}-5P_{3/2}-4D_{3/2,\;5/2}$ 전이선을 이용하여 레이저의 세기, 편광조합, 그리고 정렬상태에 따른 이중공명광펌핑(double resonance optical pumping; DROP) 스펙트럼을 조사하였다. $5P_{3/2}-4D_{5/2}$ 전이선에서 레이저의 세기에 따른 초미세 구조간의 DROP 신호의 변화가 크게 나타났고, 그 원인은 순환전이선의 낮은 광펌핑 효율 때문이었다. 두 레이저의 편광조합을 달리 했을 때 이중공명의 전이율이 변하고, 이러한 효과가DROP스펙트럼의 변화로 나타났다. 또한 두 레이저가 같은 방향으로 진행하는 경우와 반대 방향으로 진행하는 경우를 비교했을 때, 스펙트럼의 선폭은 각각 12.2 MHz 와 6.9 MHz로 측정되었다.

  • 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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    • 제8권4호
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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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    • 제73권10호
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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