This Procedural Note describes how to simulate physical optics phenomena in ASAP™ (Advanced Systems Analysis Program) by Breault Research Organization, Inc.
ASAP is the only code that inherently combines geometrical optics with physical optics. ASAP automatically changes the polarization, amplitude, and phase of light as it interacts with optical components. For example, ASAP will change the polarization and amplitude of light incident on an interface according to Fresnel's equations. It will also adjust the phase of the light according to the indices of refraction, optical path length, and aberration of the optical components. ASAP automatically uses this information to compute any of the complex field quantities.
The Procedural Note begins with an introduction to physical optics, followed by a discussion of general optical system performance requirements (software capabilities), which dictate the optical configuration and obviously performance metrics. Requirements such as the point spread function (PSF), the encircled energy of a PSF, beam quality, wavefront quality, visibility, coupling efficiency, polarization, or the optical transfer function.
The Gaussian beam superpostion method is explained, along with the advantages of combining ray tracing with phyical optics calculations. Important issues related to modeling physical optics phenomena are covered, including coherence, polarization, amplitude, and phase considerations.