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Light modulation device and filter device

  • US 6,646,783 B1
  • Filed: 12/07/1999
  • Issued: 11/11/2003
  • Est. Priority Date: 12/07/1998
  • Status: Expired due to Fees
First Claim
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1. A light modulation device comprising:

  • a magnetic garnet single crystal having a main surface and an easy magnetization axis in parallel with the main surface;

    an optical source arranged such that light emitted from the optical source is introduced into the magnetic garnet single crystal and propagates in the magnetic garnet single crystal along a first direction on the main surface; and

    at least one transducer provided at the main surface of the magnetic garnet single crystal for applying a microwave signal in a region of the magnetic garnet single crystal where the light from the optical source propagates, whereby said light is modulated by said microwave signal, wherein the magnetic garnet single crystal has a <

    110>

    direction or a <

    211>

    direction as the main surface.

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