<p dir="ltr">Due to the rapidly evolving landscape of the Internet of Things (IoT), efficient<br>communication solutions are increasingly sought after. The thesis delves into<br>the development and validation of two optical communication systems (IDC,<br>2021). Capitalizing on the benefits of Optical Wireless Communication (OWC)<br>and Optical Frequency Identification(OFID), two innovative optical systems are<br>introduced: a single-pixel OFID optical reader and a computer vision-based<br>communication system that utilizes an OLED tag, a camera, and a laptop as a<br>reader. These systems are designed to surpass the challenges associated with<br>existing technologies like RFID and Bluetooth, offering enhancements in<br>security, privacy, and autonomy through the integration of energy harvesting<br>technologies. Moreover, the practical application of these systems in real-world<br>settings, such as animal and object identification, highlight their versatility<br>and potential for diverse IoT applications. The prototypes presented were<br>systematically developed and subjected to a series of evaluations to assess their<br>performance. These tests focused on measuring the communication distance<br>achieved, the power consumption of the devices, and the accuracy of data<br>transmission. The experiments demonstrated the technical feasibility of the<br>systems in real IoT environments, affirming their effectiveness in overcoming<br>distance limitations and energy efficiency challenges and providing an<br>alternative solution for accurate data transmission in environments where radio<br>communications cannot operate. These findings underscore the significance and<br>applicability of optical communications.<br>highlight<br></p>

<div>The purpose of this thesis was to investigate the possibility of Optical Frequency Identification (OFID) technology being used as a communication pathway for devices in LiFi systems that serve to open alternative transmission paths for Internet-of-Things infrastructure. LiFi or light-fidelity, plays off the concept of wireless-fidelity, commonly known as WiFi, and follows the trend of moving to higher frequencies within the electromagnetic spectrum. LiFi lies within the visual light and infrared wavelength range, which can be referred to as the nanometer wave range. The developed optical communication testbed is a proof of concept showing that OFID technology, enabled by Gallium Arsenide solar cell emission, can communicate with Visual Light Communication (VLC) systems. The scope of the work entails the development of a testbed for a custom optical communications testbed for OFID linked to VLC communication by sending transmissions via powerline modulation. An optical receiver circuit was developed and tested, and integration and testing for powerline communication and LED luminaire were successful. Manchester encoded data was sent at 4800 bit rate optically from an infrared light source, received by the developed receivers and was decoded. Information was successfully transmitted over powerline from computer terminal to LED luminaire output at 2400, 3600, 4800, 7200, and 9600 bit rate. Integration of these communication links did not occur due to Purdue University closure of campus related activities from COVID-19.<br></div>