: modulation of the phase of a radio carrier wave by voice or other signal
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The other approach, known as phase modulation, sends laser light into a cavity and then applies radio-frequency signals to control the phase of the light, generating frequency repetitions for use in combs.—IEEE Spectrum, 12 Mar. 2024 Lukens’ team then used a second round of phase modulation to compress the energy further, expanding the duration of the time windows to 36 picoseconds (or 36 trillionths of a second).—Zeeya Merali, Scientific American, 5 June 2013
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