Advanced modulation format generation using high-speed directly modulated lasers for optical metro/access systems

摘要

We discuss and experimentally demonstrate the optical signal generation of various advanced modulation formats at high-speed using a directly modulated chirp-managed laser (CML), including phase-shaped binary transmission (PSBT), inverse-return-to-zero duobinary (IRZ-duobinary), Manchester-duobinary, return-to-zero differential phase shift keying (RZ-DPSK) and return-to-zero differential quadrature phase-shift-keying (RZ-DQPSK). The generated optical signals have improved dispersion tolerance and their corresponding transmitters have the features of compactness, low power consumption and cost-effectiveness, which are desirable in optical metro/access systems. Their system applications are also discussed.