科研之友
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摘要
We presented a novel all-optical clock recovery scheme based on nonlinear polarization rotation (NPR) in a semiconductor optical amplifier (SOA) ring fiber laser for acquiring amplitude-equalized clock from input pseudo-random bit sequence (PRBS) return-to-zero (RZ) signal. Adjusting polarization direction of optical field in ring cavity, the reflective SOA together with the polarization beam splitter (PBS) can function as a saturable transmitter, where a high peak power is depressed and a low peak power is enhanced, amplitude ripple of recovered clock can be suppressed effectively. Clock amplitude jitter (CAJ) of recovered clock is lower than 1.5% over a 25 nm tuning range.
