f the communication system in ten years by 2030, which is much more than what 5G can provide [13]. In 6G "intelligent connect- ivity" comprises of intelligent interconnectivity among objects and network designs. To meet the demands of future 6G communication, photonics provides the poten- tial platform. Communication in 6G will be in terahertz (THz) and visible light communication (VLC), for which photonic devices can play a key role. Photonics technology has the distinct benefit of achieving a high modulation order by wave- mixing, high-speed amplitude, and encoding introduced by optical technologies. The high data rate of 6G communication can be achieved through THz communi- cation by implementing photonics [14]. The integration of a large number of pho- tonic components on a single chip provides the photonic integrated circuit. The key supporting technologies of 6G communication systems like AI, quantum computing, quantum communication, and THz communication are supported by photonic archi- tecture for efficient performance. 10.1.1 KEY FEATURES AND PERFORMANCE INDICATORS In 6G the peak data rate is the main concern as by 2030 there will be lots of data-hungry applications introduced. It is expected to have 10 terabits per second data rate which is 10 times much more than the 5G communication data rate [2, 7, 14, 15]. The second key performance parameter is global connectivity. It is likely to have cell-free communication with worldwide connectivity in 6G communi- cation. In the 6G communication system there will be communication object to object with the associated IoE technologies, namely, a connection anywhere and at any time should be there for communication. As compared to a million devices per square kilometer for 5G, 6G is going to have 107 devices/Km² [2, 7, 14, 15]. Efficient spectral utilization is one of the key aspects of 6G communication. It is predicted to have an intelligent network system in the future for educa- tional organizations, hospitals, commercial offices, factories, and other smart gad