Abstract
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.
© 2008 IEEE
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