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Optical transceiver and optical communications network for both of optical fiber transmission and free space transmission

  • US 5,959,752 A
  • Filed: 10/18/1996
  • Issued: 09/28/1999
  • Est. Priority Date: 10/19/1995
  • Status: Expired due to Fees
First Claim
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1. An optical transceiver comprising:

  • a light-emitting element that emits an optical signal;

    a photodetecting element that converts an optical signal into an electrical signal;

    first coupling means for optically coupling the light-emitting element and the photodetecting element to an optical fiber transmission path;

    second coupling means for optically coupling the light-emitting element and the photodetecting element to a free space when the light-emitting element and the photodetecting element are not coupled to the optical fiber transmission path by the first coupling means;

    driving means for driving the light-emitting element in accordance with an electrical signal that is supplied from an external system; and

    output means for outputting, to the external system, the electrical signal produced by the photodetecting element.

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