Rsoft note仿真基本步骤学科知识.pptxVIP

Rsoft note 仿真基本步骤 新建器件 选择好2D/3D以及器件的结构通用参数赋值 注意是波导还是fiber 利用CAD功能设计器件 特别注意设计复杂结构时，结构之间用merge的方式还是add的方式，如果用merge的方式，则高低两种不同折射率波导merge到一起后，取折射率高值。如果add，则是二者折射率相加。 Edit launch field. Edit path way，就是选择通光的路径 Edit monitor，就是选择监控的输出参数 perform simulation or compute mode CAD设计 进行CAD 器件结构设计时，注意从一端开始画器件的各个部分。 通过新增变量来定义各个结构参数，便于后续调整。 利用好offset，一般其中某部分利用前一个相连部分的终端作为起点，这样保证后续结构参数改动时，还可以保持器件本身的结构。 利用 MOST optimizer scanner 可以进行参数扫描，扫描时，选择扫描参数，计算结束，会给出monitor value随扫描参数的变化情况。 关于输入场的设置 Computed Mode This option first computes the mode of the input structure using the iterative method, stores the result in a file and then launches that mode into the structure to perform a regular calculation. A series of temporary files, btmp*.*, are generated by the program. the step size to be employed in the mode calculation is controlled by the variable step_size_idbpm, which allows the step size in the iterative mode calculation to be different from the step size in the normal beam propagation calculation. 关于mode solving的两种方法 The iterative method is the default choice and is recommended for most standard waveguide problems. The correlation method can have advantages for problems such as antiguiding, leaky, lossy, or radiating modes, or when large numbers of modes need to be calculated. Mode solving 使用此功能时，要确保希望解出的模式都能被有效激发。 Generally, any field such as a simple Gaussian launched off center will do this, and a reasonable displacement is half the waveguide width.（偏离中心半个波导宽度的高斯场可以实现） the mode data is contained in the file prefix.m##, and has a corresponding WinPLOT command file prefix.p##, where ## is the mode number. 关于输出 prefix.###是slice的输出数据文件 prefix.m##是mode的输出数据文件 Field Output Format：This option sets the format for saving the output field (field at final Z position).. The field is saved in a data file prefix.fld, Monitor Output：This option instructs the program to save the monitor output if monitors have been defined. The raw monitor data is saved in a file prefix.mon, with a