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Method and apparatus for optical RF phase equalization

  • US 4,771,398 A
  • Filed: 04/30/1986
  • Issued: 09/13/1988
  • Est. Priority Date: 04/30/1986
  • Status: Expired due to Term
First Claim
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1. A circuit for performing phase equalization on frequency components of an electrical signal, the circuit comprising:

  • means for modulating a coherent light beam with a multifrequency electrical input signal to form an image;

    means for forming a Fourier plane and spatially distributing the frequency components of the image on the plane;

    means located in the Fourier plane for controlling the optical path length at points in the plane thereby shifting the phase of each distributed frequency component to form a transformed image; and

    means for detecting the transformed image and forming a phase-equalized electrical output therefrom.

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