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Techniques for stabilizing the carrier-envelope offset (CEO) frequency of an optical frequency comb are prerequisites for precision spectroscopy. A 2f-to-3f self-referencing interferometer (SRI) requires only a 2/3-octave bandwidth of supercontinuum (SC) light; however, it has not been regarded as a practical method because the conversion efficiency of third-harmonic generation is much lower than...
By employing 25-GHz-mode-spacing electro-optics-modulator-based optical frequency comb at telecommunications wavelengths, we have successfully demonstrated that phase noise in a commercially available signal generator at 25 GHz can be dramatically reduced to less than ever before.
We demonstrate a phase-noise linear increment proportional to the spectral mode number of a 25-GHz-spaced frequency comb generated from a phase-modulated laser by using the beat note between each comb mode and a tunable laser.
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