Title :
A 4*5 Gb/s transmission system with all-optical clock recovery
Author :
Barnsley, P.E. ; Wickens, G.E. ; Wickes, H.J. ; Spirit, D.M.
Author_Institution :
British Telecom Lab., Ipswich, UK
Abstract :
The authors demonstrate successful 5 Gb/s operation of an all-optical clock extraction circuit in a 20 Gb/s optical time division multiplexing OTDM system. An optical clock signal was obtained by synchronizing a self-pulsating 1.56 mu m laser diode to a 5 GB/s RZ data signal, demultiplexed from a 4*5 Gb/s OTDM transmission system. Synchronization was achieved for pseudo-random-bit sequences from 2/sup 7/-1 to 2/sup 31/-1. At 2/sup 7/-1 full system bit-error-ratio (BER) measurement on one of the 5 GB/s channels using the extracted optical clock for synchronization were made with no observed penalty over transmitter clock measurements. Such clock extraction techniques may be of great importance in a wide variety of telecommunications applications.<>
Keywords :
clocks; multiplexing equipment; optical communication equipment; time division multiplexing; 1.56 micron; 20 Gbit/s; 5 Gbit/s; OTDM system; all-optical clock recovery; bit-error-ratio; clock extraction circuit; clock measurements; demultiplexed; laser diode; optical clock signal; optical time division multiplexing; pseudo-random-bit sequences; self-pulsating; signal synchronization; telecommunications applications; transmission system; Clocks; Data mining; Diode lasers; High speed optical techniques; Optical filters; Optical receivers; Optical sensors; Optical switches; Optical transmitters; Synchronization;
Journal_Title :
Photonics Technology Letters, IEEE
