光束传播法 meaning in English
bpm
Examples
- Then numerical algorithms are used to analyze integrated optical wave - guide and beam propagation method is a good method which is widely used
于是出现了用数值分析方法来分析集成光波导。其中，光束传播法就是分析光波导器件的一种好方法。 - The simulation using the bi - directional beam propagation method proves that the demultiplexer can have very low insertion loss and high isolation ratio
藉由双向光束传播法来仿真此组件，结果显示此解多任务器具有很低的插入损耗和高的隔离度。 - First , i made and improved some beam propagation method ( bpm ) programs , consisting of 2d ( eim - bpm ) and 3d bpm , with transparent boundary condition ( tbc ) and perfectly matched layer ( pml ) boundary condition respectively
首先建立了光束传播法( bpm )的模拟平台，解决了边界问题。利用建立的三维bpm平台设计了渐变折射率波导的mmi耦合器。 - First , we simply introduced the optical wave - guide theory : the fluctuation equations of planar wave - guide and the preparation of embranchment wave - guide . then based on maxwell equations and in the paraxial limit we deduced the formula needed in calculating fd - bpm . the refractive index section was n ( x , y )
然后我们在maxwell方程的基础上，根据慢包络近似理论，在折射率截面为n ( x ， z )的条件下，利用有限差分近似来代替偏微分方程，推出了有限差分光束传播法计算所需要的公式。 - Second , the mode fields of a strip waveguide and some slab waveguides have been simulated by applying finite - difference time - domain ( fdtd ) method . the curvature radius ; vicinity coupling ; transition loss and power attenuation of a s - shape bend waveguide have been analysed numerically by employing wide angle finite - difference beam propagation method ( fd - bpm ) , as well as the coupling loss of optical fiber and waveguide . in addition , the framework of the s - shape waveguide laser has been
其次,应用时域有限差分法,结合波导模式理论对条形与平面波导进行了模场仿真;应用广角有限差分光束传播法,对s形弯曲波导的曲率半径、邻近耦合、过渡损耗、功率衰减以及波导与光纤的各种耦合损耗进行了数值分析,并在此基础上,对s形波导激光器的结构作了初步设计。