Photonic computing is a type of computing technology that uses light or photons to process and transmit information instead of relying on electrons, which is how traditional electronic computing systems work. In a photonic computing system, light waves are used to carry data and perform calculations, instead of relying on electric currents.

In a photonic computing system, information is encoded in pulses of light that travel through optical fibers or other optical components such as waveguides and switches. These signals are then processed using photonic circuits, which use elements such as mirrors, lenses, and beam splitters to manipulate and combine the light waves.

Photonic computing has the potential to be faster and more energy-efficient than traditional electronic computing, because photons can travel faster and use less energy than electrons. It is also less susceptible to interference and noise, which can degrade signal quality in electronic systems. However, photonic computing is still in the research and development phase, and there are many technical challenges that must be overcome before it can become a practical technology for everyday use.