Polarization - Improved simulation of real-world devices in ASAP
Updated: Mar 04, 2015
Author(s): Breault Research Organiztion
This technical publication describes new polarization features in the Advanced Systems Analysis Program (ASAP®) from Breault Research Organization (BRO).
Analysis of polarization has been a part of ASAP for much of its history. With the advent of ASAP 2008 and continuing with subsequent ASAP releases, significant new features have enhanced this capability. New classes of polarization elements have been added that improve the simulation of a range of real-world devices. Source polarization may be controlled using an explicitly defined reference ray, and randomization of source polarization makes it possible to model effects that idealized sources cannot produce. Ray distribution files can now include polarization data, and these files can be loaded to re-create a polarization field from previous ray trace results. Ray polarization data may be tracked in Jones vector mode or in Stokes vector mode, with the latter enabling modeling of partial polarization effects. Analysis features include output of polarization data in Jones or Stokes vector form, and a Poincaré Sphere Visualization Tool to show polarization state data and to allow exploration of the relationship among polarization, flux, position, and direction of rays.
Summary of document changes
For ASAP 2010 V1R1, a description of the BIC command was added to this technical publication, as well as the special-purpose MEDIA BIAXIAL command to support the BIC command. The BIC command is used to define a layered device with birefringent media, a birefringent coating. The MEDIA BIAXIAL command allows the efficient entry of biaxial material refractive indices as a dummy media definition. The project files have not changed. (Nov 2010)
This document was updated to incorporate changes in ASAP 2009 V1R1. Device-definition commands are now available for General Axial Medium (GUM) and Liquid Crystal Cell (LCC). GUM is based on the behavior of uniaxial birefringent materials under a small-birefringence approximation. LCC is a model for typical liquid crystal materials with spatially varying uniaxial birefringence. (Nov 2009)