Optical waveguides – With optical coupler – Particular coupling function
Reexamination Certificate
2005-02-15
2005-02-15
Font, Frank G. (Department: 2883)
Optical waveguides
With optical coupler
Particular coupling function
C398S081000, C398S149000, C385S039000
Reexamination Certificate
active
06856724
ABSTRACT:
A compensation system for adaptive equalization of an optical signal, wherein an optical filter, whose complex coefficients are adjustable, is used for signal equalization. The quality of the optical signal is used, after conversion to an electrical data signal, as a control criterion. The compensation device can largely compensate for distortion produced by dispersion, polarization mode dispersion or self phase modulation. An optical compensation filter with a wide free spectral range is used to compensate for the wavelength-dependent dispersion in a wavelength-division multiplexed system. The setting of the filter may be fixed, or may be adjusted adaptively in a closed control loop.
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Bulow et al., “Adaptive PMD Mitigation at 10 Gbit/s using an Electronic SiGe Equalizer IC”, pp. 138-139.
Merker et al., “Comparison of PMD-compensation techniques at 10 Gbit/s using an optical first order compensator and electrical transversal filter”, pp. 135-141.
Bohn Marc
Glingener Christoph
Mietzner Jan
Mohs Georg
Otte Sven
Bell Boyd & Lloyd LLC
Font Frank G.
Mooney Michael P.
Siemens Aktiengesellschaft
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