Abstract

We experimentally characterize the performance of a continuously tunable all-optical complex-coefficient finite-impulse-response (FIR) filter that exploits nonlinear signal processing (multiplexing and multicasting) and conversion-dispersion-based optical delays. Various length (three and four) optical FIR filters with different tap amplitudes (from 0 to $-9\mathrm{dB}$), tap phases (from 0 to $2\pi$), and tap delays ($\sim 37.4\mathrm{ps}$ and 25 ps) are realized, showing reconfiguration and tuning capabilities of this FIR filter. The measured frequency responses show close agreement with the theoretical filter responses.

© 2012 Optical Society of America

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