Hybrid Raman/Bismuth Doped Fiber Amplifier and O Band Transmission System

O-band amplifiers can be used to extend the transmission distance of high-speed O-band transmission systems. Previously, there was no practical O-band amplifier available. Semiconductor optical amplifier (SOA) has a pattern effect problem, and Praseodymium doped fiber amplifier (PDFA) has a reliability problem because it is a fluoride-based fiber. Recently, bismuth-doped quartz fibers for O band amplification have been extensively studied. This fiber is based on silica. Its compatibility with standard telecommunication fibers makes the manufacture of fiber amplifiers more practical. To extend single-span transmission, distributed Raman amplifiers have been used in the C and L bands to provide distributed gain along the transmission fiber. In this project, we will study the use of low-cost direct modulation diode lasers for single-span O-band transmission links and hybrid amplification using bismuth fiber amplifiers and distributed Raman amplifiers. The successful development of O band amplifiers will fill the gap in the market and can be adopted in optical networks and increase the capacity for the demand for bandwidth as massive video streaming, cloud computing applications, electronic service and remote working.