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本文提出一种带非线性电子色散补偿器（EDC）的时钟数据恢复（CDR）集成电路，用于补偿直接调制分布式反馈激光器（DML）因频率啁啾引起的色散，从而以较低成本实现超过20km的光纤链路传输。该芯片采用90nm CMOS工艺，支持6Gb/s的数据速率。
medium-reach optical links due to its cost effectiveness. However, DMLs are not appropriate for use in fiber links longer than 20km at 6Gb/s or equivalent, because the SNR penalty increases abruptly due to excessive chromatic dispersion caused by frequency chirp. Therefore externally modulated lasers (EMLs), which are more costly, have been a natural choice for applications requiring extended reach. In this paper, a clock and data recovery (CDR) IC that compensates for chromatic dispersion caused by the frequency chirp of the DML is presented. The CDR with EDC is fabricated in a 90nm CMOS process, and the test-chip consumes 226mW at 6Gb/s. In a DML, the optical wavelength is strongly affected by the emission power of the optical signal, due to a phenomenon called adiabatic chirp. A frequencychirped optical waveform is dispersed through an optical
Kyeongha Kwon, Jonghyeok Yoon, Soon-Won Kwon, Jaehyeok Yang,
Joon-Yeong Lee, Hyosup Won, Hyeon-Min Bae KAIST, Daejeon, Korea The directly modulated distributed-feedback laser (DML) is widely employed in