All-optical clock recovery from short asynchronous data packets at 10 Gb/s

In this letter, we demonstrate clock extraction from 10-Gb/s asynchronous short data packets. Successful clock acquisition is achieved from data packets arriving at time intervals of only 1.5 ns, irrespective of their precise phase relation. The clock recovery circuit used consists of a Fabry-Perot filter and an ultra-fast nonlinear interferometer gate and requires very short time for synchronization.