Abstract
The behavior of a sampling optical phase-locked loop (OPLL) is analyzed. An equivalent time invariant system model for the sampling OPLL was derived. With the help of the model, the stability of a sampling OPLL was found to depend not only on the sampling frequency but also on the duty cycle of the sampling pulse. In addition, the closed-form solutions for the sampling OPLL output noise and nonlinear distortions were also derived. The theoretical results were validated by numeric simulations.
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