Properties Of Scalable Chirped-Pulse Optical Comb In Erbium-Doped Ultrafast All-Fiber Ring Laser

We report on a scalable chirped-pulse Er-doped all-fiber laser, passively mode-locked by single-wall carbon nitride nanotubes. The average output power is similar to 15 mW, which corresponds to a peak power of similar to 77 W, and pulse energy of similar to 1.9 nJ and was achieved using a single amplification stage. We observed chirped-pulse generation with a duration of similar to 24.6 ps at a relatively low repetition rate of similar to 7.9 MHz, with a signal-to-noise ratio of similar to 69 dB. To characterize the short-term stability of the obtained regime, we have measured the relative intensity noise of the laser, which is <-107 dBc/Hz in the range of 3 Hz-1000 kHz. It should be noted that the standard deviation of root mean square of average power does not exceed a magnitude of 0.9% for 3 h of measurement.