Integrated-optic dispersion slope equalizer for N/spl times/ several tens of Gb/s WDM transmission |
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Authors: | Takiguchi K Okamoto K Goh T Itoh M |
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Affiliation: | Photonics Labs., NTT Corp., Kanagawa, Japan; |
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Abstract: | We report a dispersion slope equalizer on a planar lightwave circuit for wavelength division multiplexing (WDM) transmission. This device consists of an array of lattice-formed equalizers with different compensation values fabricated on one wafer and arrayed-waveguide gratings for wavelength multi/demultiplexing. We describe its configuration, operational principle, parameter design, fabrication, and measured characteristics in detail. N/spl times/20 and N/spl times/40 Gb/s slope equalizers were fabricated and their characteristics agreed well with designed values. We also report a reduction in the bias electrical power needed for thermooptic phase shifters in the equalizer array that we realized by employing a phase trimming technique normally used for optical switches. |
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