Lali-Dastjerdi Zohreh, Rottwitt Karsten, Galili Michael, Peucheret Christophe
DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
Opt Express. 2012 Jul 2;20(14):15530-9. doi: 10.1364/OE.20.015530.
We demonstrate experimentally and numerically an unexpected spectral asymmetry in the saturated-gain spectrum of single-pump fiber optical parametric amplifiers. The interaction between higher-order four-wave mixing products and dispersive waves radiated as an effect of third-order dispersion influences the energy transfer to the signal, depending on its detuning with respect to the pump, and breaks the symmetry of the gain expected from phase-matching considerations in unsaturated amplifiers. The asymmetry feature of the saturated spectrum is shown to particularly depend on the dispersion characteristics of the amplifier and shows local maxima for specific dispersion values.
我们通过实验和数值模拟证明了单泵浦光纤光学参量放大器饱和增益谱中存在意想不到的光谱不对称性。高阶四波混频产物与三阶色散效应产生的色散波之间的相互作用会影响向信号的能量转移，这取决于信号相对于泵浦的失谐情况，并打破了不饱和放大器中相位匹配所预期的增益对称性。结果表明，饱和谱的不对称特性特别取决于放大器的色散特性，并且在特定色散值处出现局部最大值。
