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Multi-Loop opto-electronic microwave oscillator with a wide tuning range

  • US 5,777,778 A
  • Filed: 08/01/1996
  • Issued: 07/07/1998
  • Est. Priority Date: 01/23/1996
  • Status: Expired due to Term
First Claim
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1. An opto-electronic system, comprising:

  • an electro-optical modulator having an electrical input port and an optical output port, operating to generate an optical signal that is modulated at an oscillating frequency related to an electrical driving signal from said electrical input port;

    a first feedback loop, operating to receive a first portion of said optical signal and to produce a first electrical feedback signal to said electrical input port with a first amount of delay and a first positive feedback; and

    a second feedback loop, operating to receive a second portion of said optical signal and to produce a second electrical feedback signal to said electrical input port with a second amount of delay and second positive feedback,wherein said first electrical feedback signal and said second electrical feedback signal cooperatively affect said electrical driving signal and said first and second feedback loops have a total open loop gain greater than unity.

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