on technology. Recent advancements in photonics technology could lead to a wide range of commercially sustainable 6G communication. Photonics devices are capable of handling and pro- cessing unparalleled volumes of data traffic with high energy efficiency, security, and low cost, resulting in new viable approaches [15]. The limits of electronic devices are overcome by photonic signal processing, which can accommodate multi-GHz sam- pling frequencies. As mentioned in [21-24] the all-optical phenomenon provides the extra cutting edge for optical and quantum computation. Figure 10.2 shows the wide range of photonic devices such as laser sources, optical amplifiers, optical switches, optical modulators, and optical passive devices that can be used to realize 6G com- munication [15, 24-26]. 5G Wireless Communication System in Healthcare Informatics Photonics devices for 6G communication systems Laser Optical Passive Switches Modulator Source Amplifier devices Fixed and Multi MMI based MMI based switch MMI based coupler wavelength Laser Amplitude Modulator Tunable Laser SOA Amplifier Ultra fast switch Phase Modulator MMI based filter MMI based Heterogeneous III-V MMI based Si SOA Polarisation AWG demultiplexer Ring Laser independent switch MMI based Picosecond On chip reflector WDM cross connect Pulse Laser Ring Resonator based Ring filters Heterogeneous Laser Switches MMI based Polrarisation splitter MMI based Polarisation combiner MMI based polarisation independent delay lines FIGURE 10.2 Photonic devices for 6G communication systems. 10.3.1 PHOTONICS COMPONENTS The photonics components are the crucial partner in the implementation and real- ization of 6G communication. As proposed in [25] Light Fidelity (LiFi) and 3D imaging are door opening technologies for 6G. VLC, quantum communication, and LiFi-based communication are some of the key supporting technologies for 6G com- munication systems. Visual light communication (VLC), in which LED and laser sources are present, is best suited for 6G communication, because it