Figure 4From: A blueprint for a simultaneous test of quantum mechanics and general relativity in a space-based quantum optics experiment Full schematic of the payload optical system. Key: PD: photodetector; PM: polarisation-maintaining; PBS: polarising beamsplitter; AOM: acousto-optic modulator. The setup is designed to minimise the effects of other degrees of freedom besides the Shapiro delay that may introduce distinguishability at the output of the interferometer.Back to article page