Frosz Michael H
DTU Fotonik, Department of Photonics Engineering, Technical University of Dennmark, Ørsteds Plads 343, DK-2800 Kgs. Lyngby, Denmark.
Opt Express. 2009 Sep 28;17(20):17950-62. doi: 10.1364/OE.17.017950.
The influence of strong loss peaks on the dispersion (through the Kramers-Kronig relations) of a nonlinear waveguide is investigated theoretically. It is found specifically for degenerate four-wave mixing in a poly(methyl methacrylate) microstructured polymer optical fiber that the loss-induced dispersion significantly modifies the wavelengths for which there is phase-match. Depending on the pump wavelength, the waveguide dispersion, and the loss peaks, it is possible for the output spectrum to either be unaffected by the loss-induced dispersion modulation, or to show an increase in the efficiency of nonlinear spectral broadening, compared to the expected efficiency when ignoring the loss-induced dispersion modulation.
从理论上研究了强损耗峰对非线性波导色散（通过克拉默斯-克朗尼格关系）的影响。具体发现在聚甲基丙烯酸甲酯微结构聚合物光纤中的简并四波混频中，损耗引起的色散会显著改变相位匹配的波长。根据泵浦波长、波导色散和损耗峰的情况，输出光谱有可能不受损耗引起的色散调制的影响，或者与忽略损耗引起的色散调制时的预期效率相比，显示出非线性光谱展宽效率的提高。
