Space diversity receiver for optical communications

Details Space diversity receiver for optical communications Space diversity receiver for optical communications

2011-05-24

2011-05-24

Le, Uyen-Chau N (Department: 2874)

Optical communications

Receiver

Including optical element

C385S015000, C398S209000, C398S214000

Reexamination Certificate

active

07949262

ABSTRACT:
An optical beam combiner is provided, which allows efficient collection of light for various applications: non-line of sight and free-space optical communications, remote sensing, optical imaging and others. A multitude of transverse scattered optical beam portions is captured by the multi-aperture array positioned perpendicular to the beam projection direction. These beam portions are combined first into a single optical waveguide with modulating the beam portions phase and coupling ratio of directional couplers in the optical beam combiner tuned to maximize the final output power. A portion of the output beam is used for the power detection and forming a feedback signal for the phases and coupling ratios adjustment. The data is recovered from the received optical beam using coherent detection.

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