Fig. 8 | Communications Physics

Fig. 8

From: Wavelength division multiplexing of continuous variable quantum key distribution and 18.3 Tbit/s data channels

Fig. 8

Noise loading setup. Outline of the experimental setup for generating in-band amplified spontaneous emission (ASE) noise. The wavelength selective switches (WSSs) are generating a wideband notch with 19 dB attenuation (not using the full attenuation as in the transmission experiments). The power is measured on each side of the notch, using an optical spectrum analyzer, and averaged. By knowing the notch attenuation we can calculate the in-band ASE noise power. EDFA Erbium doped fiber amplifier, WSS wavelength selective switch, VOA Variable optical attenuator, CV-QKD continuous variable quantum key distribution

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