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Abstract

Fiber-optic beam routing and amplitude control modules based on a unique fault-tolerant scheme using a macro-pixel to control an optical beam are proposed. The unique macro-pixel method involving multiple device pixels per beam inherently provides a robust digital technique for module control while adding to the optical beam alignment tolerance and resistance to catastropic failure for the overall module. The macropixel approach solves the speed versus alignment and failure sensitivity dilemma present in single pixel element based optical micromechanical systems (MEMS). Specifically proposed are fault tolerant fiber-optic attenuators and switches using several microactuated micromirrors per optical beam. Transmissive and reflective module geometries are proposed using small tilt and small distance piston-action micromirrors, leading to fast module reconfiguration speed fiber optic signal controls. The macro-pixel design approach is extended to other pixel technologies such as polarization rotating pixels. The proposed fiber-optic attenuator and switch designs can be extended to realize a complex network of multiple attenuators and switches that can be applied to N-wavelength multiplexed fiber-optic networks.

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First Claim