Fig. 3: Experiments.
a Experimental setup. CW: continuous-wave; ATT: attenuator; COL: collimator; S: beam-splitter; L: lens; PM: power-meter. b Amplifier output power and on-chip net gain as function of the on-chip pump power. c Optical spectra before and after amplification; PSD: power spectral density. d–f Frequency resolved optical gating (FROG) traces showing second harmonic intensity as function of FROG delay (256 × 256 data points) and reconstructed temporal pulse (power and phase) of the original, the pre-chirped input and the output pulses. Dots and solid lines represent measured and smoothed measured data, dashed lines represent simulated data. The respective FROG errors are 1.282 × 10−5, 2.75 × 10−6, and 1.19 × 10−5.
