Figure 1
From: A fiber-based quasi-continuous-wave quantum key distribution system
The schematic of the quasi-cw CVQKD experiment.
AOM, acousto-optic modulator; PBS, polarization beamsplitter; WGN, white Gaussian noise; AM, amplitude modulator; PM, phase modulator; BS, beamsplitter; PD, photo detector; VATT, variable attenuator; DWDM, wavelength devision multiplex component; HED, heterodyne detector; HD, homodyne detector; LPF, low-pass filter. The inset is the layout of the heterodyne detection system.
