激光相位多普勒(PDA)能够同时测量粒子的速度、大小和相对折射率。
Laser phase Doppler anemometry (PDA) technology can be used to measure moving particle's velocity, size and relative refractive index simultaneously.
文中还验证了单模光纤的模场直径、截止波长、相对折射率差对OTDR曲线的影响。
In this article, the influences of the mode field diameter, the cutoff wavelength and the relative refractive index difference on the OTDR curve are also verified.
且光谱基波分量及低次谐波分量的贡献依赖于粒子直径、标准偏差及相对折射率的大小。
The contributions of wave component of different orders are dependence on the mean diameter, size distribution and relative refractive index of the particles.
实验结果表明，随着粒子半径、粒子密度和相对折射率的增加，散射的强度将显著增加。
The experiment results show that the intensity of scattering will increase evidently with the increasing of particle size, particle density and relative refractive index.
但是，在空心光束中可以实现对地折射率粒子的稳定捕获，即粒子的相对折射率可以小于1。
But, when the doughnut laser beam is used as trapping light, relative index can be less than 1. The beam waist of focused laser beam has a virtual affection for the trapping force.
利用该方法研究了煤烟凝聚粒子的散射问题，讨论了分形煤烟凝聚粒子的散射强度随凝聚粒子的形状、结构、相对折射率及入射波波长变化的情况。
The structure of the carbon aggregate particles is simulated with the fractal theory and the problem of the electromagnetic absorption by the soot aggregates is discussed.
利用该方法研究了煤烟凝聚粒子的散射问题，讨论了分形煤烟凝聚粒子的散射强度随凝聚粒子的形状、结构、相对折射率及入射波波长变化的情况。
The structure of the carbon aggregate particles is simulated with the fractal theory and the problem of the electromagnetic absorption by the soot aggregates is discussed.
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