Enhancing Transmission Performance with Multi-Band Fiber Systems
Multi-band systems are revolutionizing the way fiber networks handle capacity expansion by utilizing additional wavelength bands. These systems offer cost-effective solutions that make use of existing infrastructure while addressing the increasing demand for data transmission. However, the introduction of additional bands such as the L-band and S-band alongside the C-band brings technical challenges, including managing signal distortions, nonlinear effects, and signal-to-noise ratio (SNR) reductions.
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Figure: (A) Multi–span system setup and pre–tilting of the spectrum for SRS compensation (right side: considered wavelength bands), (B+C) OSNR at the end of a fiber–optical transmission link total link length for span lengths of 50 km and 125 km.
Figure: (A) Decrease of OSNR with increasing bandwidth for different span lengths and number of spans, (B) Maximum transmission distance versus bandwidth, (C) Relative change of maximum transmission distance versus bandwidth, (D) Achievable relative bandwidth increase versus span length and OSNR margin. Parameter in A-C: span length.
Figure: Pre–tilted input spectrum for various channel maps (left side) and spectral power distribution at the output of the transmission fiber (right side).