Observation of large continuous-wave two-photon optical amplification

被引：23
|
作者：
Concannon, HM
Brown, WJ
Gardner, JR
Gauthier, DJ
机构：
[1] Department of Physics and Center for Nonlinear and Complex Systems, Duke University, Box 90305, Durham, NC
来源：
PHYSICAL REVIEW A | 1997年 / 56卷 / 02期
关键词：
D O I：
10.1103/PhysRevA.56.1519
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We observe 30% two-photon optical amplification of a probe laser-field propagating through a laser-pumped potassium vapor. This amplification is spectrally isolated and substantially larger than that of previously reported continuous-wave two-photon amplifiers. The combination of large amplification and spectral isolation of the two-photon gain feature will greatly facilitate precise studies of the photon statistics of this highly nonlinear quantum amplifier and the development and characterization of a two-photon laser based on this gain medium. We also observe spectrally-distinct three-photon amplification (similar to 5%) in the same system under different experimental conditions. We present a simple model of the interaction that gives qualitative agreement with our observations and explains the dependence of the two-photon gain on the various system parameters. This model predicts that the size of the two-photon gain is quite sensitive to an interference between two different quantum pathways.
引用
收藏
页码：1519 / 1523
页数：5
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