实验研究了混沌激光通过脂肪乳液的时间点扩展函数(TPSF)的特性。采用混沌光作为光源，利用混沌信号的相关函数具有delta函数特性的特点，将探测到的信号与原始信号作互相关运算，提取出测量系统的TPSF。实验中通过增加脂肪乳液的浓度,使其散射系数增大，保持吸收系数不变,得到混沌光穿过不同浓度脂肪乳液的TPSF,从获得的TPSF中提取出差分路径长度因子(DPF)，定性地分析脂肪乳液的光学特性。实验结果表明，随着脂肪乳液浓度的不断增大，两路信号的相关度不断减小，DPF与脂肪乳液的散射系数呈正相关。

Characteristics of the temporal point spread functions (TPSFs) of chaotic laser through intralipid solution are experimentally studied. Based on the delta function characteristic of the correlation function of chaotic signal, we retrieve TPSFs of the measured system with chaotic laser as light source by correlating the detected signal with the original signal. The scattering coefficient is increased by increasing the concentration of intralipid solution. While the absorption coefficient maintains unchanged, TPSFs of the intralipid solution at different concentrations are experimentally measured and the differential path-length factors (DPFs) are extracted from the TPSFs of intralipid solution, which can qualitatively reflect the optical properties of the intralipid solution. Results show that degree of the correlation between the two signals is decreasing with the increasing concentration of intralipid solution, and DPFs are positive correlation with the scattering coefficient of intralipid solution.