Extended Data Fig. 8: Simulation of a lensed communication system containing a light-emitting fibre and a photodetecting fibre.

a, Illustration of the fibre system structure. Red, photodetector; blue, light-emitting device; grey, PC cladding. Fibre size, 500 µm × 500 µm. The black dot denotes the centre of the fibre. b, Results of the ray-optics simulations that show collimation of the emitted light and focusing of the light on the photodetecting device, with the devices placed 190 µm from the centre of the fibre.