Abstract
The technical feasibility (pre-FEC BER<3.8×10−5) of an unamplified 4×100Gb/s wavelength division multiplexed direct-detection optical orthogonal frequency division multiplexing (OFDM) system that uses electro-absorption modulators is numerically demonstrated for 2 and 10-km reach of single-mode fiber in C-band. Based on the use of specifications of currently available (realistic) components, error-free operation is achieved by finding optimum values for bias voltage and electrical gain in the modulator, and by employing a simple, yet powerful, peak-to-average power ratio (PAPR)-reduction technique. A performance comparison with a Mach-Zehnder driven system is presented too. The architecture here put forward can be used to define next-generation 400Gb/s Ethernet standard.
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