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Optical communication apparatus and method

  • US 5,040,242 A
  • Filed: 06/28/1990
  • Issued: 08/13/1991
  • Est. Priority Date: 09/16/1987
  • Status: Expired due to Fees
First Claim
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1. A bi-directional optical communication modulation/demodulation apparatus connected between a pair of optical communication media and a local information processor and capable of converting an electrical signal to an optical signal and vice versa for data communication via said optical media with a remote data information processor, comprising:

  • first conversion means for converting local data information signals to optical signals for sending to a remote information processor, said first conversion means having connector means for connection between said apparatus and said local information processor for receiving a local input electrical data signal from said local information processor via an electrical data signal line, and having pulse-width modulation means for conducting pulse-width modulation of the received input electrical data signal in synchronization with the leading edge of a clock signal from a clock circuit to thereby produce a pulse-width modulated input electrical data signal, and having electrical to optical converter means for converting the modulated input electrical signal to an optical signal and having external coupling sending means for delivering said optical signal to one of said optical communication media;

    second conversion means for converting incoming remote origination signals, said second conversion means having external coupling receiving means for receiving, through the other of said optical information media, a pulse-width modulated input optical information media, a pulse-width modulated input optical signal originating from a remote information processor, and having opto-electrical converter means for converting the received optical signal into a corresponding electrical signal having substantially the same pulse width relating to said modulated input optical signal, and having receiving electrical demodulation means for demodulating said corresponding electrical signal, and having local processor connector means for delivering the demodulated corresponding electrical signal to said local information processor; and

    power producing means for producing stable DC electrical power for said apparatus also being connected to said electrical data line from said local data processor for receipt of said local input electrical data signal from said local information processor and for delivering from said power producing means the produced electrical power to said first and second conversion means when said input electrical signal is transmitted to said apparatus from said local information processor.

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