Multiple-input method and apparatus of free-space optical communication

摘要

The present application is directed an optical gyroscope. The optical gyroscope includes a substrate including a first and a second waveguide disposed thereon. One or both of the waveguides may be doped with a rare-earth material. A crossing element is disposed between the first and the second waveguides to form a substantially orthogonal connection therebetween. The application is also directed to a system including an optical gyroscope. The application is further directed to a method of observing characteristics of the optical gyroscope.

主权项

1. A method comprising:
collecting two or more free space optical beams including data encoded with space-time block codes onto a multimode fiber bundle having two or more spatially separated subapertures; outputting a sub-beam carrying information thereon from each subaperature; detecting each of the sub-beams to produce outputs; controlling amplitude and phase independently for each of the sub-beams according to multiple-input multiple-output processing; and recovering, based upon the data encoded with space-time block codes, multiple, undistorted signals including spatially multiplexed, independent information streams from the outputs, wherein the subaperatures of the multimode fiber bundle are each coupled to a transmit aperture forming a matrix, the matrix having plural propagation coefficients, each propagation coefficient representing an attenuation value and phase delay of the coupled subaperature and transmit aperature, and the matrix is inverted to separate the multiple, undistorted signals including spatially multiplexed, independent information streams and correct for atmospheric turbulence causing distortions.