Recent Advances in Graphene-Assisted Nonlinear Optical Signal Processing

Figure 6

Experimental setup for degenerate FWM based wavelength conversion in graphene. Inset: “sandwiched structure” graphene sample used as a nonlinear optical device. ECL: external cavity laser; AWG: arbitrary waveform generator; TF: tunable filter; OC: optical coupler; PC: polarization controller; OSA: optical spectrum analyzer; and VOA, variable optical attenuator.