TITLE

Multiplex nonresonant pump four-wave mixing

AUTHOR(S)
Eun Seong Lee; Dae Sik Choi; Jae Yong Lee; Jae Won Hahn
PUB. DATE
July 2004
SOURCE
Applied Physics Letters;7/26/2004, Vol. 85 Issue 4, p546
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We propose a scheme of multiplex nonresonant pump four-wave mixing (NRP-FWM) process which is highly immune to saturation problems. The process is accomplished with two high-intensity pump beams detuned far from the resonance of the sample under investigation and a resonant probe beam as weak as possible not to give rise to nonlinear absorption. Only a single-broadband probe beam is used for the multiplex experiment to detect the electronic swan band spectrum of C2 molecules in a premixed acetylene–oxygen flame. Comparing the signal of the degenerate four-wave mixing (DFWM) experiment on the same sample, we found that the signal level at which the NRP-FWM starts to show saturation is about 250 times higher than in the case of the DFWM.
ACCESSION #
13885878

 

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