Abstract
AbstractWe demonstrate an ultra‐high‐speed transmission system‐based, all‐optical wavelength conversion using Gaussian pulse shaping and 128 quadrature amplitude modulation. In this system, the modulated ultra‐high‐speed, photonic‐carrier signals with the modulation format of 128 quadrature amplitude modulation are coupled with the outputs of the double pump lasers, and amplified by nonlinear, all‐optical processing via a semiconductor optical amplifier. The transmission system with the wavelength conversion from 193.4 to 193.19 THz is then achieved. By the compensation of transmission impairments based on the digital signal processing algorithms, the single‐carrier signals with the converted wavelength of 193.19 THz are transmitted over the standard single‐mode fiber with the bit rate of 227 Gbps. In addition, the transmission performances influenced by the optical signal‐to‐noise ratio, injection current of the semiconductor optical amplifier, and the bandwidth of the Gaussian optical filter are analyzed. The relationship curves about bit error rate and error vector magnitude under different conditions are given, and the relationship between bit error rate and error vector magnitude is demonstrated.
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