Name: CAIO MARCIANO SANTOS
Publication date: 19/02/2025
Advisor:
Name |
Role |
|---|---|
| MARCELO EDUARDO VIEIRA SEGATTO | Advisor |
Examining board:
| Name |
Role |
|---|---|
| EVANDRO CONFORTI | Examinador Externo |
| HELDER ROBERTO DE OLIVEIRA ROCHA | Examinador Interno |
| JAIR ADRIANO LIMA SILVA | Coorientador |
| MARCELO EDUARDO VIEIRA SEGATTO | Presidente |
| MARIA JOSE PONTES | Coorientador |
Pages
Summary: Optical recirculation loops are essential tools in the study of long-haul optical fiber communication systems. The technique allows light to travel for multiple rounds through fiber spans, simulating extended transmission distances without the need for physically long fiber setups. As a laboratory tool, it is particularly useful for investigating the effects of amplifier noise and optical nonlinearity in long-haul links. In other contexts, it is widely used for validating and designing submarine networks, these of which are imperial to our modern networks, bringing connectivity across the globe. The advent of 5G technology, combined with Optical Wireless Systems (OWS), promises to revolutionize communication networks. 5G offers unprecedented speeds and connectivity, while OWS provides a complementary solution for high-capacity, short-range communication. Together, they enable a wide range of applications, from enhanced mobile broadband to ultra-reliable low-latency communications, supporting the growing demand for data and connectivity in smart cities and industrial automation. 5G New Radio (NR) represents the global standard for the air interface of 5G networks, developed by the 3rd Generation Partnership Project (3GPP). Using advanced technologies such as orthogonal frequency division multiplexing (OFDM), massive MIMO, and beamforming to deliver lower latency, higher capacity, and improved spectral efficiency. 5G NR supports a wide range of frequency bands and deployment modes, making it a versatile and scalable solution for future wireless communication needs. When merging recirculation loops with 5G technology and standardization, a robust OWS is created, capable of delivering signals in the most vast environments. Thus, this work presents the design, execution, and validation of a recirculation loop prototype, as well as the validation of a 5G antenna prototype executed by a third party. With the standalone loop, distances of up to 100, 600, 900 and 1400 km are achieved at 1.47, 2.21, 2.94, and 3.65 Gb/s, respectively. In the OWS containing the loop and the antenna prototype, distances
of up to 100 km and 500 km for 1.94 and 1.46 Gb/s, respectively. Finally, for a 5G NR OWS operating within the FR1 n77 band, with a total of 450 MHz allocated for four individual 100 MHz channels, transmission distances of 400 km for channel 1, and 500 km for channels 2 to 3 were obtained with a raw rate of 229.5 Mb/s per channel.
