Fig. 2: Output characteristics of the few-cycle thulium-doped fiber laser for intrapulse difference frequency generation (IPDFG). | Light: Science & Applications

Fig. 2: Output characteristics of the few-cycle thulium-doped fiber laser for intrapulse difference frequency generation (IPDFG).

From: Watt-scale super-octave mid-infrared intrapulse difference frequency generation

Fig. 2

a Measured (red) and simulated (black) intensity autocorrelation of the nonlinear compressed pulses. The inset shows the numerically retrieved intensity envelope of the pulse with a peak power of 0.9 GW. b Measured spectrum (red) and simulated (black) spectrum of the nonlinearly compressed pulses emitted by the Tm:FCPA-seeded antiresonant hollow core fiber at 1.25 MHz repetition rate

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