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optical frequency combs illustration
    
  Appears In
      
      Detangling Light-based Thermometers with Combs
      
            The “dip” in wavelengths that the sensor causes in the light from the optical frequency combs corresponds to a “dip” in wavelengths in the radio comb made when light from the two optical combs is combined.

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Credit
                                Sean Kelley/NIST HEADQUARTERS
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