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Tunable Diffraction Grating

InterScience has developed a tunable diffraction micrograting on a chip. The key feature of this MOEMS-based compound grating is that its diffractive properties can be changed simply by the application of a voltage without the need for multiple gratings or mechanical drives. A voltage application of about 40 volts is required. It has been applied to the development of an ultralightweight spectrometer and also has application in optical switches.