The nonlinear optical properties of AlGaAs at the half band gap
The nonlinear optical properties of AlGaAs at the half band gap
复制标题
DOI：
10.1109/3.556002
复制
发表时间：
1997-03-01
影响因子：
2.5
通讯作者：
Villeneuve, A
中科院分区：
文献类型：
--
作者：
Aitchison, JS;Hutchings, DC;Villeneuve, A
报道了AlGaAs在半带隙光谱范围内的非线性光学系数的实验值。测量了TE偏振光和TM偏振光的非线性折射率系数nL的色散。我们观察到n(2)(TE)>；n(2)(TM)和交叉相位调制与自相位调制(TE)之比类似于从能带结构计算中预测的0.95。还测量了双光子和三光子吸收系数的光谱依赖性，最后讨论了它对全光开关和空间孤子传输的影响。
We report experimental values for the nonlinear optical coefficients of AlGaAs, in the half-band-gap spectral region. The dispersion of the nonlinear refractive-index coefficient, nl, is measured for both TE- and TM-polarized light. We observe n(2)(TE) > n(2)(TM) and a ratio of cross-phase modulation to self-phase modulation (TE) of similar to 0.95, as predicted from bandstructure calculations. The spectral dependence of the two- and three-photon absorption coefficients are also measured, Finally, the implications for all-optical switching and spatial soliton propagation are discussed.