The results indicate that, under the thermal noise approximation, the measurement accuracy of Brillouin frequency shift is dependent on thermal noise, the derivative of the transmission function of the edge optical filter and the power of Brillouin scattering optical signal. 结果表明,在热噪声近似下,布里渊频移测量精度与热噪声、边缘光滤波器透射函数的导数及布里渊散射光信号功率有关。
We present sets of symmetry average points in the Brillouin zone from which the average over the Brillouin zone of a periodic function of wave vector can be determined easily. The calculation accuracy is comparable to that of special points, but the calculation labour is reduced considerably. 本文提出了一些布里渊区中的对称平均点,用它可以方便地计算布里渊区中的平均值,其精度可以和特殊点相比而计算量却要小得多。
Stimulated Brillouin scattering ( SBS) reflectivity as a function of pump power density, pressure of medium and focal length for broadband KrF laser pump was investigated experimentally. 实验上研究了宽带KrF激光抽运的受激布里渊散射(SBS)随抽运功率密度、介质气压和透镜焦距这三个实验参数的变化规律。
In this dissertation, based on the Internet of Things technology, distributed optical fiber sensing technology and embedded technology, we implement B-DOFS ( Distributed Optical Fibre Sensor based on brillouin scatter) with the function of The Internet Of Things ( IOT), on embedded platform. 本文基于物联网技术、分布式光纤传感技术及嵌入式技术,实现了具备物联网功能的嵌入式布里渊分布式光纤传感器。
In the calculation, we neglect the Coulomb scattering due to the strong degenerate condition of the hole gas in all cases. The temperature effect is introduced through the temperature dependence of the magnetization following the Brillouin function. 由于空穴始终处于强简并极限下,因此我们在计算中忽略了库仑散射,温度效应通过磁矩Brillouin函数引入。