How to Convert from RSoft Simulations to Zemax and Back

This tutorial illustrates how to convert information from Zemax into RSoft’s propagation software and back. This can be useful for multi-stage cases in which one part of the system is a bulk optical system, and a waveguide in others. In this example, we will look at the coupling from a focusing lens into a small silica fiber. 

We will first create output information from Zemax and then convert these files into field files that can be used for a BPM propagation. The result will be that Zemax is used to propagate a Gaussian complex amplitude through a bulk optical system, and focus it at the input face of a single mode fiber. The resulting complex amplitude is then imported into RSoft software and propagated through the fiber. The resulting data can then be read back into Zemax if needed.

Authored By: Matthew Frank

Published On: April 11, 2008

How to Model Cleaved Fibers

This article describes how to include cleaved fibers in Physical Optics fiber coupling calculations.


Authored By: Mark Nicholson

Published On: July 16, 2008

How to Get Real Waveguide Mode Data Into Zemax

Zemax now supports the input of mode field data from Optiwave's OptiBPM and OptiFiber codes. This makes it easy to improve the accuracy of fiber and waveguide coupler designs using Physical Optics in Zemax, by providing more accurate input data. This article gives several examples.


Authored By: Mark Nicholson

Published On: January 20, 2007

Multi-Mode Fiber Coupling

This article demonstrates the use of the Geometric Image Analysis feature to compute multi-mode fiber coupling efficiency. The sample file can be downloaded from the link in the Sample Files section.

Authored By: Nam-Hyong Kim, Updated by Kristen Norton

Published On: March 11, 2016

Single-Mode Fiber Coupling in OpticStudio

This article explains:

  • How to set up a fiber coupling system

  • How to use paraxial Gaussian beam calculations

  • How to use the single-mode fiber coupling calculation

  • How to use the Physical Optics fiber coupling calculation

  • How to account for reflection losses and material absorption

The article is accompanied by a ZIP archive containing the sample OpticStudio files used.

Authored By: Mark Nicholson, Kristen Norton

Published On: March 10, 2016

What is a Ray?

This article explains:
  • What a ray is
  • Rays and wavefronts
  • Coordinates, cosines, and propagation
  • Refraction, reflection, and diffraction
  • Amplitude. phase and optical path                         


Authored By: Ken Moore

Published On: December 2, 2015

Understanding Paraxial Ray-Tracing

This article explains:
  • What paraxial rays are
  • What parabasal rays are
  • Differences between them that can cause confusion

The article is accompanied by a ZIP archive containing the samples used and a macro. This can be downloaded from the final page of the article.


Authored By: Mark Nicholson

Published On: July 21, 2005

What is an "Effective F-Number"?

This article explains:
  • The meaning of F-Number for optical systems with non-circular stops
  • The theoretical basis for the defined effective F-Number in Zemax                               

Authored By: Ronian Siew

Published On: December 29, 2015

How to Model Corner-Cube Retroreflectors

Corner Cube retroreflectors are commonly used in a wide range of optical systems. This article describes various different ways in which these components can be modeled in Zemax OpticStudio. The treatment can be as detailed as the user needs, with effects due to face misalignment, roofline straddling, thin-film coatings, diffraction etc included as required.

Authored By: Mark Nicholson

Published On: December 14, 2015

How to Debug a Double-Pass Lens File

This article describes an easy way to test whether a double-pass lens file is correctly set up, or not, and to identify where any errors are.

Authored By: Mark Nicholson

Published On: January 4, 2016

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