Journal of the Optical Society of Korea

  • 제7권3호
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  • Pages.174-179
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  • 2003
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  • 1226-4776(pISSN)
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  • 2093-6885(eISSN)
한국광학회 (Optical Society of Korea)
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Quantum Interference Effects on Optical Amplification and the Index of Refraction in a Four-Level System

  • Zhang, Hui-Fang (College of Physics, Jilin University, Key Lab of Coherent Light, Atomic and Molecular Spectroscopy, Educational Ministry of China) ;
  • Wu, Jin-Hui (College of Physics, Jilin University, Key Lab of Coherent Light, Atomic and Molecular Spectroscopy, Educational Ministry of China) ;
  • Gao, Jin--Yue (College of Physics, Jilin University, Key Lab of Coherent Light, Atomic and Molecular Spectroscopy, Educational Ministry of China)
  • 투고 : 2003.02.26
  • 발행 : 2003.09.01
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초록

We construct a four-level system where a metastable state is included in an $Er^{3＋}$ Doped Yttrium aluminum garnet (YAG) crystal. Because of the action of the coherent field, the traditional light amplification with inversion can be exhibited with remarkable variation. As a result, we propose a method to achieve the gain equalization by atomic coherence. At the same time, we find that the high index of refraction accompanied by vanishing absorption can also be reached in this model. We also find that a higher index of refraction with zero absorption can be easily obtained when the coherent field is off resonance.

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참고문헌

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피인용 문헌

  1. High index of refraction via quantum interference in a three-level system of Er3+-doped yttrium aluminium garnet crystal vol.15, pp.8, 2006, https://doi.org/10.1088/1009-1963/15/8/028
  2. Lasing without population inversion in an Er3+-doped YAG crystal vol.59, pp.5, 2012, https://doi.org/10.1080/09500340.2011.634974