Fig. 1. Experimental setup for the generation and measurement of multimode squeezed frequency comb states. SHG: second harmonic generator; Local: local oscillator.

Fig. 2. (Color online) Simulation results for the shaped LO pulses. S0–S4 represent the five different modes.

Fig. 3. (Color online) Squeezing traces for the five leading supermodes. In each trace, the blue line represents the SNL, the black dotted line shows the experimental result, the red solid line shows the corresponding fitting curve, and the bottom and top dashed lines indicate the squeezing and anti-squeezing levels, respectively.