Wavelength Division Demultiplexing and Cross-Talk Assessment of a Photonic Crystal Filter
Résumé
We report on the design, fabrication and characterization of a filter for demultiplexing in the wavelength division domain realized with a H0 cavity on a III-V photonic crystal (PhC) membrane. This device is single mode, the total insertion losses are about 10.5 dB, the drop efficiency is close to 40 % and the channel isolation can exceed 20 dB at 500 GHz. 28 Gbit/s NRZ wavelength demultiplexing shows less than 0.5 dB penalties. Cross talk measurements demonstrate less than 1 dB penalty when adjacent channels are spaced as closely as 235 GHz, demonstrating the good compatibility of this filter with LAN-WDM systems. Finally, 56 Gbit/s NRZ-DQPSK signal filtering is assessed revealing negligible penalty (< 0.5 dB).
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