Method and apparatus for optical rf phase equalization

Details Method and apparatus for optical rf phase equalization Method and apparatus for optical rf phase equalization

G - Physics

06

G

333/26, 345/55

G06G 7/00 (2006.01) G06E 3/00 (2006.01)

Patent

CA 1276696

ABSTRACT OF THE DISCLOSURE Phase equalization of a phase-distorted multifrequency signal is accomplished by acousto-optic modulating a coherent light beam with the signal taking the optical Fourier transform with the resultant Fourier plane containing all frequency components spatially distributed. A control array, positioned in the Fourier plane and/or local oscillator, contains adjacent elements having their birefringence variable with respect to each other thereby selectively altering the light path length and/or amplitude of each frequency component passing through the element. The resultant transformed image then undergoes optical down conversion to obtain the electrical signal having its phase equalized relative to the distorted input signal.

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