Phase-modulated fiber optic telecommunications system

  • US 6,469,816 B1
  • Filed: 05/24/2001
  • Issued: 10/22/2002
  • Est. Priority Date: 05/24/2001
  • Status: Active Grant
First Claim
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1. A fiber optic data transmission system comprising:

  • a transmitter having a laser emitting a continuous wave light, a phase modulator phase modulating the continuous wave light as a function of an electronic input data stream and of an electronic feedback loop with a feedback time delay, the electronic feedback loop being fed back to the electronic input data stream, so as to create an optical signal bearing information in phase-modulated form, and a telecommunications optical fiber connected to at least one receiver, the phase-modulator being connected to the telecommunications fiber so that the phase-modulated information optical signal is transmitted over the telecommnunications fiber without recombining with the continuous wave light, the receiver including an interferometer having a first fiber arm and a second fiber arm and having an interferometric delay being a function of the feedback time delay.

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