Simultaneous bidirectional digital data transmission over a single line at a common frequency on an optical waveguide

A device for bidirectional digital data transmission on an optical waveguide comprising:

• a first transmitter/receiver unit connected to a second transmitter/receiver unit by the optical waveguide, said first transmitter/receiver unit comprising:
• data input means for inputting a data signal in electrical form, said data signal having a pulse width T.sub.b ;
• data editing means for reducing a pulse width of said signal received from said data input to generate an output with a pulse width T.sub.r and a reception pause having a width T.sub.b -T.sub.r ;
• optical transmitter means for receiving said signal of a pulse width T.sub.r and generating an optical signal having a pulse width T.sub.r ;
• an optical coupling element for coupling said optical signal of a pulse width T.sub.r to said optical waveguide;
• an optical receiver connected to said coupling element, said optical receiver for receiving optical signals of a pulse width T.sub.r and generating electrical signals of a pulse T.sub.r ;
• pulse-width correction means for receiving electrical signals from said optical receiver of a pulse-width T.sub.r and providing an output of corrected signals having a pulse width T.sub.b, said output of said data editing means being connected to said input of said pulse-width correction means;
• bit-code error measurement means for detecting unfavorable timing between transmitted and received optical signals, said bit-code error measurement means being connected to said data editing unit for reporting said unfavorable timing;
• and
• data output means connected to said bit-code measurement means for output of transmitted data, said second transmitter/receiver unit comprising:
• data input means for inputting a data signal in electrical form said data signal having a pulse width T.sub.b ;
• data editing means for reducing a pulse width of said signal received from said data input to generate an output with a pulse width T.sub.r and a reception pause having a width T.sub.b -T.sub.r ;
• optical transmitter means for receiving said signal of a pulse width T.sub.r and generating an optical signal having a pulse width T.sub.r ;
• an optical coupling element for coupling said optical signal of a pulse width T.sub.r to said optical waveguide;
• an optical receiver connected to said coupling element, said optical receiver for receiving optical signals of a pulse width T.sub.r and generating electrical signals of a pulse T.sub.r ;
• pulse-width correction means having an input for receiving electrical signals from said optical receiver of a pulse-width T.sub.r and providing an output of corrected signals having a pulse width T.sub.b, said output of said data editing means being connected to said input of said pulse-width correction means;
• control signal output means receiving said output of said pulse-width correction means and generating a control signal output for varying a time of transmitting a pulse width T.sub.r transmitted from said second transmitter/receiver unit during said reception pause (T.sub.b -T.sub.r) received from said first transmitter/receiver unit, said control signal output being applied to said data editing unit;
• and
• data output means, connected to said control signal means for output of transmitted data.