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Variable group-delay dispersion equalizer using lattice-form programmable optical filter on planar lightwave circuit

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4 Author(s)
K. Takiguchi ; NTT Opto-Electron. Labs., Ibaraki, Japan ; K. Jinguji ; K. Okamoto ; Y. Ohmori

The authors report, in detail, an integrated-optic variable group-delay dispersion equalizer based on a lattice-form programmable optical filter. The variable dispersion equalizer consists of an alternating cascade of symmetrical and asymmetrical Mach-Zehnder interferometers. An equalizer with nine symmetrical and eight asymmetrical interferometers is fabricated on a planar lightwave circuit and its dispersion varied step by step from -681 to +786 ps/nm in the operational frequency range of 16.3 GHz. The effectiveness of the equalizer is shown by compensating the dispersion of three different fibers with a single equalizer. The performance of the equalizer is also evaluated and examined by numerical investigations

Published in:

IEEE Journal of Selected Topics in Quantum Electronics  (Volume:2 ,  Issue: 2 )