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Burst-Mode Clock Recovery Utilizing Relaxation Oscillation in Directly Modulated Lasers

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3 Author(s)
Minhui Yan ; Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, ON ; Chih-Hung Chen ; Huang, Wei-Ping

A novel clock recovery scheme utilizing the relaxation oscillation in a directly modulated laser (DML) for burst-mode transmission is proposed for the first time. In this scheme, the DML generates the clock tone along with the transmitted non-return-to-zero data in the optical signal. An injection-locked oscillator (ILO) is employed in the receiver to extract the clock tone and restore the clock. The proposed scheme is investigated systematically and verified by simulations with different laser modulation currents as well as some nonideal characteristics of the system. The simulation results show that the low cost clock recovery method using an ILO in an optical link using a regular DML is highly efficient for burst-mode transmission at 10 Gbps.

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Lightwave Technology, Journal of  (Volume:26 ,  Issue: 12 )