Optical CPFSK 2 Gbit/s 202 km transmission experiment using a narrow-linewidth multielectrode DFB LD

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Abstract
Multielectrode DFB LDs, which have a flat frequency-modulation response ranging from 50 kHz to 500 MHz and a minimum spectral linewidth of 4.5 MHz, are developed. A 2 Gbit/s optical CPFSK 202 km transmission experiment is conducted using the newly developed LD without optical feedback.