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Fast tunable parallel optical delay line

Wang, Bing C. and Glesk, Ivan and Runser, Robert J. and Prucnal, Paul R. (2001) Fast tunable parallel optical delay line. Optics Express, 8 (11). pp. 599-604. ISSN 1094-4087

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A new tunable optical delay line for OTDM applications can achieve sub-nanosecond tuning time across three time slots spaced 100ps apart. Using parallel fiber delays, the delay line requires only one modulator operating below the baseband data rate. A simple control algorithm based on a latency diagram can further reduce the average latency beyond that of the straightforward hardware implementation by 50%. Using the demonstrated delay line, 10 GHz electronics has the potential to access a throughput of 160Gb/s optical data.