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Tracking frequency conversion and network analyzer employing optical modulation

  • US 9,634,763 B2
  • Filed: 06/03/2015
  • Issued: 04/25/2017
  • Est. Priority Date: 06/03/2015
  • Status: Active Grant
First Claim
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1. A tracking frequency converter employing optical modulation comprising:

  • an optical modulator configured to receive a radio frequency (RF) signal and to modulate an optical signal according to the received RF signal; and

    a first square-law photodetector configured to receive the modulated optical signal and another optical signal to convert the received RF signal into an intermediate frequency (IF) output signal having a predetermined frequency, one or both of the modulated optical signal and the other optical signal being a tunable optical signal,wherein the tunable optical signal is configured to track a frequency of the received RF signal such that a frequency difference between a spectral component of the modulated optical signal and the other optical signal is equal to the predetermined frequency of the IF output signal.

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