In this paper, an analytical model to investigate the parametric amplification （PA） and the PA ＋ stimulated Raman scattering （SRS） in silicon waveguides is put forward. When two pump signals are employed, the PA ...In this paper, an analytical model to investigate the parametric amplification （PA） and the PA ＋ stimulated Raman scattering （SRS） in silicon waveguides is put forward. When two pump signals are employed, the PA bandwidth of the probe signal is so large that the Raman contribution has to be considered. When Raman contribution fraction f is set to be 0, only the PA occurs to amplify the probe signal, and when f is set to be 0.043, the PA and the SRS amplify the probe signal at the same time. The signal amplifications of both single and dual pump schemes are investigated by using this model. With this model, three main affecting factors, i.e., zero dispersion wavelength （ZDWL）, third-order dispersion （TOD）, and fourth-order dispersion （FOD）, are discussed in detail.展开更多
Ⅰ. INTRODUCTIONNatural radiative lifetime of rare-earth elements has been studied extensively during the last few years. But most of these studies are limited to the low-excited states. Up to now, no data about the l...Ⅰ. INTRODUCTIONNatural radiative lifetime of rare-earth elements has been studied extensively during the last few years. But most of these studies are limited to the low-excited states. Up to now, no data about the lifetime of Sm atoms in high-excited state are known. The energy level of Sm measured belongs to odd-parity state and is less than 30,000 cm<sup>-1</sup>.展开更多
基金Project supported by the National Basic Research Program of China (Grant No. 2010CB327605)the Discipline Co-construction Project of Beijing Municipal Commission of Education, China (Grant No. YB20081001301)the Fundamental Research Funds for Central Universities, China (Grant No. 2011RC008)
文摘In this paper, an analytical model to investigate the parametric amplification （PA） and the PA ＋ stimulated Raman scattering （SRS） in silicon waveguides is put forward. When two pump signals are employed, the PA bandwidth of the probe signal is so large that the Raman contribution has to be considered. When Raman contribution fraction f is set to be 0, only the PA occurs to amplify the probe signal, and when f is set to be 0.043, the PA and the SRS amplify the probe signal at the same time. The signal amplifications of both single and dual pump schemes are investigated by using this model. With this model, three main affecting factors, i.e., zero dispersion wavelength （ZDWL）, third-order dispersion （TOD）, and fourth-order dispersion （FOD）, are discussed in detail.
文摘Ⅰ. INTRODUCTIONNatural radiative lifetime of rare-earth elements has been studied extensively during the last few years. But most of these studies are limited to the low-excited states. Up to now, no data about the lifetime of Sm atoms in high-excited state are known. The energy level of Sm measured belongs to odd-parity state and is less than 30,000 cm<sup>-1</sup>.
