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Optical modulator

  • US 6,046,837 A
  • Filed: 12/07/1998
  • Issued: 04/04/2000
  • Est. Priority Date: 12/08/1997
  • Status: Expired due to Term
First Claim
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1. An optical modulator comprising:

  • an optical modulation element with an electro-optic crystal substrate, the electro-optic substrate having a plurality of apertures which are switched between a light transmitting state and a light cut-off state by control of drive voltage that is applied;

    drive means for applying said drive voltage across each said aperture;

    temperature detection means for detecting a temperature of said electro-optic crystal substrate;

    cooling means for cooling said electro-optic crystal substrate; and

    control means for controlling said cooling means so that the temperature of said electro-optic crystal substrate does not exceed a predetermined temperature, based on information from said temperature detection means.

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