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We demonstrate reconfigurable demultiplexing of arbitrary single or multiple 10 Gb/s tributary channels from a higher rate 40 Gb/s data signal using a programmable planar lightwave circuit (PLC) and four-wave mixing (FWM). The PLC is a thermally tunable six-stage lattice-form Mach-Zehnder interferometer fabricated in silica-on-silicon. We present results for optical time-division-multiplexing (OTDM) demultiplexing of both return-to-zero on-off keying (RZ-OOK) and differential phase-shift-keying (RZ-DPSK) data.

We demonstrate a tunable pulse repetition rate multiplier using a silica-based planar lightwave circuit (PLC). The PLC is a six-stage lattice-form Mach-Zehnder interferometer which can be tuned thermally to generate 20- and 40-GHz output pulse trains from a 10-GHz input. We use a nonlinear optical loop mirror as a wavelength converter to perform intensity-to-field conversion to eliminate pulse-to-pulse phase fluctuations in the higher-rate output pulse trains. Moreover, we use wavelength multicasting (simultaneous wavelength conversion) to generate multiple pulse trains (4 × 20 GHz and 4 × 40 GHz in the example shown here) from a single 10-GHz input.