POLARIZATION INDEPENDENT GRATING MODULATOR

摘要

A fiber-optic modulator based on a micromachined grating device which is both polarization independent and achromatic in behavior is described. The device is a two dimensional grating or periodic structure which is symmetric in the X and Y axes. It is comprised of a membrane (210) with holes cut in it that moves downward with the application of a voltage which starts diffracting light. The hole region may have a raised island (230) to provide achromatic behavior.