Photonics is defined as the science of using light to generate energy, detect or transmit information. Another way to define Photonics is as the technology of generating and harnessing light and many other forms of radiant energy whose quantum unit is the photon. Photonics is the physical science of light (photon) generation, detection, and manipulation through emission, transmission, modulation, signal processing, switching, amplification, and sensing.[1][2] Though covering all light's technical applications over the whole spectrum, most photonic applications are in the range of visible and near-infrared light. The term photonics developed as an outgrowth of the first practical semiconductor light emitters invented in the early 1960s and optical fibers developed in the 1970s.