G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 26/00 (2006.01) G02B 26/02 (2006.01) G02B 26/04 (2006.01) H04J 14/02 (2006.01)
Patent
CA 2137063
A method and apparatus for modulating an optical signal using a micromechanical modulator are disclosed. The modulator comprises a membrane, which consists of at least one layer, and a substrate, spaced to form an air gap. The layers of the membrane are characterized in that there is a relationship between the refractive indices of the layers and the refractive index of the substrate. The membrane is suspended in a first position over the substrate by a flexible support arrangement. Bias is applied to the membrane and the substrate to create an electrostatic force to move the membrane towards the substrate to a second position. The reflectivity of the device to an optical signal changes as the membrane moves from the first position to the second position, thereby modulating the signal.
Goossen Keith Wayne
Walker James Albert
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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