Optical diffraction gratings are indispensable elements in optical systems, enabling the separation of incident light into its component wavelengths through diffraction phenomena. With the integration of advanced optical simulation capabilities like 3DOptix, engineers, and researchers can now accurately model and analyze the performance of all diffraction gratings available in the catalog. This empowers them to thoroughly evaluate and optimize optical designs before implementation. Our diffraction grating catalog selection includes various types such as ruled (blazed), volume phase holographic, holographic, and echelle gratings. Ruled gratings feature precisely spaced grooves or lines that diffract light according to their spacing and depth, while volume-phase holographic gratings offer superior dispersion and efficiency through the use of holographic recording techniques. Holographic gratings employ interference patterns to diffract light, providing high resolution and low stray light levels. Echelle gratings are specialized devices with high dispersion capabilities, often used in astronomical spectroscopy and spectral analysis. Whether for spectroscopy, wavelength selection, or dispersion control, our diffraction gratings catalog offer versatile solutions to suit diverse application requirements. With the ability to simulate each grating with precision using 3DOptix, our optical solutions provide researchers and engineers with the tools they need to innovate and excel in their endeavors.