Measurement of the frequency response of the electrostrictive nonlinearity in optical fibers.
Measurement of the frequency response of the electrostrictive nonlinearity in optical fibers.
复制标题
光纤电致伸缩非线性频率响应的测量。
DOI：
10.1364/ol.22.000676
复制
发表时间：
1997
期刊：
影响因子：
3.6
通讯作者：
R. Boyd
中科院分区：
文献类型：
--
作者：
E. Buckland;R. Boyd
通过使用频率相关的交叉相位调制以及在光纤中共同传播的弱非偏振连续波探测波和谐波调制泵浦来研究电致伸缩对非线性折射率的贡献。自延迟零差检测用于测量施加在探测波上的边带幅度，作为泵浦调制频率从 10 MHz 到 1 GHz 的泵浦强度的函数。对于非偏振光，测得的电致伸缩非线性系数与交叉相位调制克尔系数之比对于标准阶跃折射率单模光纤为 1.58:1，对于色散位移光纤为 0.41:1，这表明石英光纤中的电致伸缩响应比之前预期的要大。
The electrostrictive contribution to the nonlinear refractive index is investigated by use of frequency-dependent cross-phase modulation with a weak unpolarized cw probe wave and a harmonically modulated pump copropagating in optical fibers. Self-delayed homodyne detection is used to measure the amplitude of the sidebands imposed upon the probe wave as a function of pump intensity for pump modulation frequencies from 10 MHz to 1 GHz. The ratio of the electrostrictive nonlinear coefficient to the cross-phase-modulation Kerr coefficient for unpolarized light is measured to be 1.58:1 for a standard step-index single-mode fiber and 0.41:1 for dispersion-shifted fibers, indicating a larger electrostrictive response in silica fibers than previously expected.