What is a Dickson Grating® and why is it different from other gratings?

A Dickson Grating® is a highly specialized volume phase transmission grating. It can diffract both orthogonal linear polarizations with equal and high efficiency at included angles greater than 90 degrees over 40 nm bandwidths. Other gratings designed to be used at these high diffraction angles will have much greater PDL, lower diffraction efficiency, and a greater variation in diffraction efficiency across a 40 nm bandwidth. The 40 nm bandwidth and favorable high dispersion angles combined with efficiencies near 95% make the Dickson Grating® highly desirable for Telecom applications such as Mux/Demux/Remux, OSA, monitors, filters and Raman Spectroscopy. The grating is named after the grating designer, and Wasatch Photonics Co-Founder, Lee Dickson.