Law Pi-Cheng, Dragic Peter D
Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
Opt Express. 2010 Aug 30;18(18):18852-65. doi: 10.1364/OE.18.018852.
Boron co-doped germanosilicate fibers are investigated via the Brillouin light scattering technique using two wavelengths, 1534 nm and 1064 nm. Several fibers are investigated, including four drawn from the same preform but at different draw temperatures. The Stokes' shifts and the Brillouin spectral widths are found to increase with increasing fiber draw temperature. A frequency-squared law has adequately described the wavelength dependence of the Brillouin spectral width of conventional Ge-doped fibers. However, it is found that unlike conventional Ge-doped fibers these fibers do not follow the frequency-squared law. This is explained through a frequency-dependent dynamic viscosity that modifies this law.
通过布里渊光散射技术，使用1534纳米和1064纳米这两种波长对硼共掺杂锗硅酸盐光纤进行了研究。研究了几根光纤，包括从同一预制棒中在不同拉丝温度下拉制的四根光纤。发现斯托克斯频移和布里渊光谱宽度随着光纤拉丝温度的升高而增加。频率平方定律已充分描述了传统掺锗光纤布里渊光谱宽度的波长依赖性。然而，发现与传统掺锗光纤不同，这些光纤并不遵循频率平方定律。这是通过修改该定律的频率相关动态粘度来解释的。
