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Electro-optic modulator

  • US 3,930,718 A
  • Filed: 04/12/1974
  • Issued: 01/06/1976
  • Est. Priority Date: 04/12/1974
  • Status: Expired due to Term
First Claim
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1. An electro-optic modulator for modulating a coherent beam of light comprising:

  • a Fabry-Perot etalon including a first and a second parallel reflective surface, constructed of an electro-optic material;

    electrically charged metal grating means including an array of alternately connected electrodes of triangular cross-section attached to one reflective surface of said Fabry-Perot etalon for creating an electrically induced diffraction grating within said Fabry-Perot etalon to modulate said coherent beam of light;

    wherein said coherent beam of light is reflected a multiple number of times within said Fabry-Perot etalong such that said coherent beam of light is diffracted said multiple number of times by said electrically induced diffraction grating thereby reducing the magnitude of an electrical signal required on said electrically charged metal grating from that required without said multiple reflections to produce a predetermined deviation of said coherent light beam.

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