Abstract
Massive parallelism in optical frequency division multiplexed (OFDM) systems requires one or another form of cascaded optical filters in order to provide the combination of narrow passband and broad timing range, resulting in a very large effective filter finesse. The composite optical transmission function is the product of two different scale filters (one of narrow passband and one broad), as has been demonstrated with the cascaded Mach Zehnder interferometer chain realized in Si-on-silica technology1 and the dual Fabry-Perot filter.2
© 1993 Optical Society of America
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