標題: Coherent control of third-harmonic-generation by a waveform-controlled two-colour laser field
作者: Chen, W-J
Lin, R-Y
Chen, W-F
Lee, C-K
Pan, C-L
光電工程學系
Department of Photonics
公開日期: 1-Jun-2013
摘要: We investigate generation of the third harmonic (TH; lambda = 355 nm) signal by two-colour excitation (lambda = 1064 nm and its second harmonic, lambda = 532 nm) in argon gas, with emphasis on the influence of relative phases and intensities of the two-colour pump on the third-order nonlinear frequency conversion process. Perturbative nonlinear optics predicts that the TH signal will oscillate periodically with the relative phases of the two-colour driving laser fields due to the interference of TH signals from a direct third-harmonic-generation (THG) channel and a four-wave mixing (FWM) channel. For the first time, we show unequivocal experimental evidence of this effect. A modulation level as high as 0.35 is achieved by waveform control of the two-colour laser field. The modulation also offers a promising way to retrieve the relative phase value of the two-colour laser field.
URI: http://dx.doi.org/10.1088/1612-2011/10/6/065401
http://hdl.handle.net/11536/22325
ISSN: 1612-2011
DOI: 10.1088/1612-2011/10/6/065401
期刊: LASER PHYSICS LETTERS
Volume: 10
Issue: 6
結束頁: 
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