Parametric Amplification and Cascaded-Nonlinearity Processes in Common Atomic System

• DOI: 10.1038/srep01885
• Publication Date: 2013-05-24T09:04:40Z
• Authors: Huaibin Zheng; Xun Zhang; Zhaoyang Zhang; Yaling Tian; Haixia Chen; Changbiao Li; Yanpeng Zhang
• Keywords: Four-wave mixing; Laser linewidth; Amplified spontaneous emission; Electromagnetically Induced Transparency; Optical parametric amplifier; SIGNAL (programming language); Phase conjugation

For the first time, we study parametric amplification process of multi-wave mixing (PA-MWM) signal and cascaded-nonlinearity (CNP) in sodium vapors both theoretically experimentally, based on a conventional phase-conjugate MWM self-diffraction four-wave (SD-FWM) processes, which are pumped by laser or amplified spontaneous emission (ASE), respectively. pumping case, SD-FWM serves as quantum linear amplifier (a CNP) out (inside) resonant absorption region. While for ASE only CNP occurs output linewidth is much narrower than that due to second selected effect its electromagnetically induced transparency window. In addition, phase-sensitive amplifying seeded two processes discussed time. Theoretical fittings agree well with experiment. The investigations have important potential applications communication.