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Optical transmission network

  • US 4,705,350 A
  • Filed: 09/19/1985
  • Issued: 11/10/1987
  • Est. Priority Date: 09/19/1985
  • Status: Expired due to Term
First Claim
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1. An optical transmission network comprising:

  • a central office,a plurality of user stations, anda plurality of bidirectional optical transmission paths for connecting said central office with each of said user stations,said central office comprising;

    a coherent light source for emitting coherent radiation to accommodate high-capacity, wide bandwidth data requirements,power dividing means for dividing said coherent radiation over said transmission paths for transmitting said coherent radiation from said central office to said user stations,modulating means associated with each of said transmission paths for modulating high-capacity, wide bandwidth information onto said coherent radiation transmitted from said central office to said user stations, anddetector means associated with each transmission path for detecting radiation transmitted from said user stations to said central office; and

    each of said user stations comprising,a detector for detecting the information modulated onto said coherent, high-capacity, wide bandwidth radiation transmitted from said central office, anda light emitting diode for transmitting low-capacity, narrow bandwidth information-bearing radiation to said central office.

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