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Design and Optimize Optical Devices and Waveguides

Industry and university research and development groups rely on RSoft BeamPROP BPM, or beam propagation method, design software to push the photonic design envelope and make advances in integrated and fiber-optic devices and circuits. Commercially available since 1994, BeamPROP can help your team easily design and simulate light propagation to analyze and optimize optical waveguides.

  • Enable fast and accurate optical device design with an industry-proven BPM algorithm.
  • Simplify router and demultiplexer design with BeamPROP’s built-in, efficient arrayed waveguide grating (AWG) utility.
  • Simulate complicated devices leveraging the advanced capabilities of BeamPROP design software.

Key Features of RSoft BeamPROP BPM

Advanced finite-difference BPM

With BeamPROP, attain superior and robust 2D and 3D simulations via a full-vectorial BPM implementation based on an implicit finite-difference scheme.

Full RSoft CAD integration

BeamPROP works with RSoft’s other passive device simulators to define a device’s material properties and structure with full RSoft CAD Environment integration.

Extensive effects

Achieve electrode and heater effects, as well as polarization effects and coupling to model anisotropic and non-linear materials and optimize optical design.

Improved wide-angle propagation

Conduct precise off-axis propagation with multi-step Padé approximation techniques, a variable reference wave number, and conformal index mapping of bends.

Bidirectional BPM-based mode solvers

Accurately model optical wave reflection and transmission in complex structures with multiple interfaces using BeamPROP’s bidirectional BPM-based mode solvers.

Robust measurement tools

Effectively measure fields, power distribution, loss, and more with BeamPROP design software.

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Explore Blogs

Featured Resources

White Papers 2025.10.20

Choosing the Right Photonic Device Design Software

To narrow the field, it can be helpful to ask these key questions.

2025.10.20

Flyers 2025.10.20

What's New in RSoft Photonic Device Tools

Learn about new features and enhancements in the RSoft Photonic Device Tools 2024.09 release.

2025.10.20

Application Notes 2026.03.02

Designing LIDAR on a Chip

LIDAR on a chip offers a compact, robust, solid‑state alternative to mechanical LIDAR for autonomous systems. Achieving high performance requires optimizing insertion loss, output power, beam steering, and beam quality. Specialized photonic simulation tools accelerate development, reduce risk, and enable scalable, commercially viable integrated LIDAR designs.

2026.03.02

Application Notes 2026.03.16

Reflective Multimode Interference Coupler

A compact reflective MMI coupler with etched TIR mirrors enables shorter, more integrated PIC designs. Because BPM and FDTD each address different modeling challenges, a co‑simulation approach using BeamPROP, FullWAVE, and MOST efficiently handles propagation, facet reflections, and MMI‑length optimization.

2026.03.16

Application Notes 2026.03.16

Studying the Mode Evolution within a Knife-Edge Taper-Based Spot Size Converter

In this application note, we explore the mode profiles evolution at specific cross-sections along a knife-edge taper-based SSC structure. Understanding how the optical mode evolves allows us to optimize various parameters of the SSC, such as taper length, core size, and material properties.

2026.03.16

White Papers 2026.03.16

Efficient and Accurate BPM Simulation of a Polarization

How a silicon‑based polarization converter‑splitter can be efficiently and accurately simulated using BPM, demonstrating that BPM achieves FDTD‑level accuracy while reducing computation time and memory usage by several orders of magnitude.

2026.03.16

Application Notes 2025.10.21

Designing a Mode Converter

The design and simulation of a mode converter that consists of two linearly-tapered rib waveguides

2025.10.21

Application Notes 2025.10.20

Arrayed Waveguide Grating Design

Learn to model AWGs with RSoft’s AWG Utility tool, using BPM and 3D EIM for efficient, low-loss waveguide simulation in photonic design.

2025.10.20

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RSoft BeamPROP BPM Design Software – FAQ

RSoft BeamPROP is beam propagation method (BPM) design software that helps researchers and development engineers rapidly and accurately design and simulate integrated and fiber-optic waveguide devices and circuits.

BeamPROP has applications in a wide range of integrated and fiber-optic devices including:

  • Wavelength division multiplexing (WDM) devices such as AWG routers
  • Switches, such as directional coupler-based or digital-Y type
  • Modulators, such as Mach-Zehnder types
  • Multimode interference devices
  • Passive 1 x N or N x N splitters
  • Laser structure transverse mode analysis
  • Standard and specialty fiber design
  • Gratings
  • Sensor structures

Both new and advanced users are able to realize the tool’s full potential. BeamPROP is fully integrated into the RSoft CAD Environment, and can accommodate complex scripting commands to perform complicated custom simulations.

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