Telecom Gratings

Volume Phase Gratings (VPG) work much like conventional surface relief reflection gratings, except in transmission.  They are periodic phase structures, whose fundamental purpose is to diffract different wavelengths of light from a common input path into different angular output paths. They are ideal for applications, such as: Wavelength Selectable Switchs (WSS), Re-configurable Optical Add-Drop Modules (ROADM), Tunable Filters, Optical Channel Performance Monitors (OPM, OCM), Optical Spectrum Analyzers (OSA) and Wavelength Blockers.