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Coupled opto-electronic oscillators with low noise

  • US 7,218,662 B1
  • Filed: 02/14/2005
  • Issued: 05/15/2007
  • Est. Priority Date: 02/12/2004
  • Status: Active Grant
First Claim
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1. A device, comprising:

  • a laser cavity comprising a first semiconductor optical amplifier forming a first end of the laser cavity, a second semiconductor optical amplifier, and an electro-absorption modulator which forms a second end of the laser cavity and is integrated to the second semiconductor optical amplifier, wherein the electro-absorption modulator modulates light in the laser cavity in response to a modulation signal;

    an optical whispering gallery mode resonator located inside the laser cavity between the first and the second semiconductor amplifiers to filter light in the laser cavity;

    a beam splitter inside the laser cavity to split a portion of the light in the laser cavity to produce an optical output;

    a photodetector to receive the optical output and to convert the optical output into a detector output; and

    a circuit to receive the detector output and to produce the modulation signal from the detector output,wherein the beam splitter, the photodetector, the circuit, and the laser cavity forms an opto-electronic loop to support an oscillation at a frequency of the modulation of light.

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