Micromechanical optical modulator with linear operating characte

Details Micromechanical optical modulator with linear operating characte Micromechanical optical modulator with linear operating characte

1996-08-19

1998-11-17

Font, Frank G.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359290, 359289, 359286, G02F 109

Patent

active

058384847

ABSTRACT:
A micromechanical optical modulator having a linear response in reflectivity, as a function of applied bias, and a method of operating and making same, are disclosed. The modulator consists of a movable layer suspended over a substrate. A gap is defined between the movable layer and the substrate. As the movable layer moves, the gap changes size, resulting in a change in modulator reflectivity. In operation, the movable layer moves within a linear operating regime under the action of an applied voltage, which is the sum of a constant bias and a signal from an analog source. A substantially linear operating characteristic, i.e., reflectivity versus applied voltage is obtained within the linear operating regime by properly selecting the size of the gap in the absence of the applied voltage and the range in the applied voltage.

REFERENCES:
patent: 5646772 (1997-07-01), Yurke
patent: 5659418 (1997-08-01), Yurke

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