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Patients who are in healthcare places need for continuous healthcare monitoring system for long periods to surveillance human body vital signs. This system should be secure, reliable, and guarantee not to interfere with available radio frequencies or sensitive electronic devises such MRI (magnetic resonance imaging) since it deals with human life. In this paper, we designed, implement and evaluate a prototype model for Li-Fi healthcare monitoring system over different propagation links as an integrated optical system. The key idea of the created system is to remove the optical background noise power and to ensure patient's mobility at distance up to 4 m and 2.5 m in Los (line of sight) and diffuser links respectively. The system is created to receive data from a fibre Bragg gratings sensor (FBG) that will be sent to the end receiver through different propagation links having 100 % accuracy. Also, it is particularized with low power consumption, low-cost components, and could be adapted to different other systems of sending or processing operation. The proposed system provides, much more accurate received data compared to previous related literature.

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<p>The optical frequency comb generator (OFCG) is an efficient optoelectronic device that is included in many important applications over a various field such as microwave and optical communication. A novel scheme of OFCG presented in this work for visible light communication application based on amplitude modulation, radio frequency (RF) signal, phase shift and two Mach-Zehnder modulators (MZMs), our design features are simple with more efficient power and premium flatness of comb lines, the number of generating frequencies lines was 64 with a power stronger than -2 dBm over a 340 GHz bandwidth from a single continuous laser diode. Different chirping factor (α) of MZMs are implemented (3, 5, 7), as the results the best results related to α=5 with extra flatness, the system was designed and simulated by VPI design suite 9.8.</p>