Abstract
We propose an advanced optical transport system utilizing higher order modulation formats and coherent detection. Our innovation introduces an 8 x 112 Gbps WDM ROF link using a 32 QAM-OFDM modulation scheme, capable for extending its reach. Our proposed research stands out from existing studies due to its distinctive use of the 32-QAM format and a 112Gbps data rate per channel, especially when considering a channel span of 3000 kilometers Our analysis covers Wavelength Division Multiplexing - Radio over Fiber (WDM-ROF) link systems, including a pre-optical amplifier within the link, one optical amplifier outside the channel loop span, and one within the loop span, representing distinct scenarios. We operated optical amplifiers in the gain-controlled mode. Remarkably, exclusive of employing precise dispersion or non-linearity improvement techniques, carried out simulations reveal optimal transmission distance for our anticipated system having considered specification parameters is 3000 Km. We conducted extensive simulations to assess the system performance in terms of Q-factor, ESE, and EVM over link spans ranging since 1000 to 15000 Kilometers.
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