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. 2017 Mar 23;8:14869. doi: 10.1038/ncomms14869

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Copyright © 2017, The Author(s)

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(a) Measured (blue dots) and theoretical (red) soliton repetition frequency versus pump-cavity detuning. The offset frequency is 22.0167 GHz. The distinct soliton operating points I, II and III refer to phase noise measurments in 3b. Point III is near the quiet operation point. (b) Phase noise spectra of detected soliton pulse stream at three operating points shown in 3a and also the noise of the cavity-pump detuning (green) with its noise floor (brown). The black line connecting the square dots is the measurement floor of the phase noise analyser. (c) Phase noise of soliton repetition rates at 25 kHz offset frequency plotted versus the cavity-pump detuning. The blue and red dots (lines) denote the experimental (theoretical) phase noise of the upper (blue) and lower (red) branch operating points, respectively.