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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 2, Iss. 5 — May. 10, 2004
  • pp: 302–304

Absorption-amplification response with or without spontaneously generated coherence effect in a four-level atomic system

Jiahua Li, Wenxing Yang, and Jucun Peng  »View Author Affiliations


Chinese Optics Letters, Vol. 2, Issue 5, pp. 302-304 (2004)


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Abstract

We discuss and analyze the absorption properties of a weak probe field in a typical four-level atomic system in the presence of a spontaneously generated coherence (SGC) term. The influences of the SGC and a coherent pump field on the probe absorption-amplification are investigated. The results show that the absorption of such a weak probe field can be dramatically enhanced due to the SGC effect. At the same time, the probe-absorption profile exhibits a two-peak structure and the probe-absorption peak gradually decreases as the pump intensity increases. On the contrary, the amplification of such a weak probe field near the line center of the probe transition can be achieved by adjusting the coherent pump field intensity in the absence of the SGC effect.

© 2005 Chinese Optics Letters

OCIS Codes
(270.1670) Quantum optics : Coherent optical effects
(270.6620) Quantum optics : Strong-field processes

Citation
Jiahua Li, Wenxing Yang, and Jucun Peng, "Absorption-amplification response with or without spontaneously generated coherence effect in a four-level atomic system," Chin. Opt. Lett. 2, 302-304 (2004)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-2-5-302

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