Multi-Material Prism Dispersion Calculator

Compute GDD (group-delay dispersion) and TOD (third-order dispersion) for a prism-pair compressor with adjustable apex angle. Supports five common optical materials with Sellmeier coefficients.

Usage:

1. Select the prism material from the dropdown.
2. Enter center wavelength, prism separation, incidence angle, and apex angle.
3. Set the insertion depth for each prism (controls material path length).
4. Click Calculate to view GDD, TOD, and internal geometry.

Reference: R. L. Fork, O. E. Martinez, and J. P. Gordon, "Negative dispersion using pairs of prisms," Opt. Lett. 9, 150–152 (1984).