Efficient curvilinear coordinate method for grating diffraction simulation

Optical Simulation of Grating Diffraction in MATLAB

The “Grating Diffraction Calculator” (GD-Calc) is a MATLAB-based, electromagnetic simulation program that computes diffraction efficiencies of optical grating structures, including biperiodic gratings. The program’s capabilities include a general and flexible grating modeling facility, structure parameterization (with any number of parameters), and unrestricted control over diffraction order se...

Efficient Smoke Simulation on Curvilinear Grids

For regular grids, the matrix coefficients of the linear system are copied from the finest to the coarsest levels. On curvilinear grids, however, the coarsening process degenerates the shape of the discretized object. Thus, simply copying the values of the matrix coefficients affects the method’s convergence. To improve it, we use the scheme described in [HSGN96]. In such a scheme, the areas an...

Efficient generation of large diffraction gratings with a grating interferometer.

The advantages of a grating interferometer for the generation of large diffraction gratings are demonstrated. In a one- and a two-stage process, high-quality gratings of 120 and 200 mm, respectively, were made with optics no larger than 50 mm together with an argon-ion laser with no line narrowing or beam stabilization and a rotating diffuser for improved beam uniformity.

Polarizing diffraction-grating triplicators.

We report experimental results with a reflective continuous anisotropic polarizing diffraction-grating beam splitter that produces three diffraction orders. The diffraction efficiencies and polarizations of the diffracted orders are controlled through the incoming polarization state and by use of a wave plate with arbitrary orientation located between the grating and a mirror. In particular, we...

The Diffraction Grating