Propagation Simulation Modules

2D and 3D BPM Simulations

Beam Propagation Method (BPM) is a numerical method that solves Maxwell’s equations in 2D and 3D planes by using a slowly varying amplitude approximation in the steady state. 

Benefits

The 2D and 3D BPM Simulations Module provides a fast, flexible, and reliable solution to implement passive building block simulations in a single propagating direction. The slowly varying amplitude approximation approach allows fast optimization of building blocks for all technologies, including low contrast.

Applications

2D and 3D BPM computes the fields in the propagating direction; this makes it ideal for building block design where back-scattered light is negligible.

The BPM method is useful for forward-only propagation simulations of larger components. Typical applications of the algorithm are in optical devices such as arrayed waveguide gratings, modulators, and Mach-Zehnder Interferometers. This module is also recommended for the design of adiabatic tapers, edge couplers and polarization-sensitive components in low-contrast technologies.

Features

Visualize and plot propagating field components.

Figure 1: BPM field in a directional coupler

Figure 2: 2D BPM field in a directional coupler

Figure 3: Tapered waveguide (Only for illustration purposes)

Figure 4: Propagation field resulting from 3D BPM simulation near the input of the taper in Figure 3

Figure 5: Propagation field resulting from 3D BPM simulation near the output of the taper in Figure 3