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Passive optical network with bi-directional optical spectral slicing and loop-back

  • US 5,680,234 A
  • Filed: 12/30/1994
  • Issued: 10/21/1997
  • Est. Priority Date: 10/20/1994
  • Status: Expired due to Term
First Claim
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1. A passive optical network utilizing bi-directional optical spectral slicing comprising:

  • a) a central office for transmitting and receiving optical information;

    b) a remote node optically linked to said central office, said remote node operable to route said optical information by wavelength band using spectral slicing; and

    c) at least one optical network unit for transmitting and receiving optical information optically linked to said remote node through a first optical fiber and a second optical fiber, each optical network unit comprisinga receiver coupled to the first optical fiber,a transmitter coupled to the second optical fiber, and a coupling device for optically coupling the first optical fiber to the second optical fiber,wherein said central office optically transmits downstream signals comprising diagnostic signals to said remote node, and said remote node optically routes said downstream signals to at least one optical network unit according to wavelength bands, and wherein said coupling device couples said diagnostic signals back to the remote node, and said remote node optically routes, according to wavelength bands, the coupled-back diagnostic signals to said central office.

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