Optical comb characterization of an all-fiber mode-locked erbium-doped ring laser with a highly-nonlinear resonator

Stable dechirped 180-fs pulses were obtained at ∼ 11.3 MHz fundamental repetition rate with signal-to-noise ratio ∼ 57.2 dB and relative intensity noise value < −101 dBc/Hz (30 Hz–1000 kHz) in an all-fiber erbium-doped ring laser with a highly-nonlinear resonator.