Acta Photonica Sinica, Volume. 40, Issue 1, 24(2011)
Spectrum Analysis of a Few-cycle Laser Pulse Propagating in a Dense Λ-type Three-level Atomic Medium
Full Maxwell-Bloch equations were solved by Predictor-Corrector method and finite- difference time-domain method to investigate spectrum of a sub-cycle laser pulse propagating in a dense Λ-type three-level atomic medium.It is found that both in a dilute medium and a dense medium,the spectrum is broaden due to the self-phase modulation(SPM); however,the width is much larger in the dense medium than that in a dilute medium because of NDD interaction.In the dense medium,the supercontinuum spectrum occurs due to SPM and NDD interaction,and the maximum frequency is 10 ωp.
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MA Hui, SONG Qiang. Spectrum Analysis of a Few-cycle Laser Pulse Propagating in a Dense Λ-type Three-level Atomic Medium[J]. Acta Photonica Sinica, 2011, 40(1): 24
Received: Apr. 21, 2010
Accepted: --
Published Online: Mar. 8, 2011
The Author Email: Hui MA (shanshimahui@yahoo.com.cn)
CSTR:32186.14.