2005 Volume 125 Issue 10 Pages 1608-1613
A 10-GHz clock signal is successfully extracted from a 160-Gbit/s optical RZ signal using devices operable up to 40 GHz. The down-conversion of the 160-Gbit/s input signal into 40 Gbit/s signal is performed by modulating the input optical signal by an LN modulator that is driven by a RF signal with an amplitude of 3Vπ and a frequency of 40 GHz. Extraction of 10-GHz clock from the down-converted signal is done by an injection locking technique. An electrical PLL circuit is also examined for a reference. Regarding the recovered clock, basic properties of hold-in frequency range, frequency response, and phase jitter are found to be satisfactory. The faultlessness of the extracted clock signal was confirmed by bit error rate measurements.
The transactions of the Institute of Electrical Engineers of Japan.C
The Journal of the Institute of Electrical Engineers of Japan