Multicasting optical switch fabric and method of detection...

Optical communications – Receiver – Heterodyne

Reexamination Certificate

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C398S202000, C398S205000, C398S206000, C398S207000, C398S208000, C398S209000, C398S210000, C398S211000, C398S213000, C398S214000, C398S182000, C398S183000, C398S192000, C398S193000, C398S194000, C398S195000, C398S196000, C398S197000, C398S141000, C398S155000, C398S158000, C398S159000, C398S160000, C398S161000, C398S162000, C398S163000, C398S033000, C398S045000, C330S059000, C330S308000, C250S2140AG, C250S2140LA, C250S2140AG

Reexamination Certificate

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07373091

ABSTRACT:
The inventors propose herein a switch fabric architecture that allows broadcasting and fast channel access in the ns-range. In various embodiments of the present invention, 10 Gb/s receiver modules are based on a novel heterodyne receiver and detection technique, which is tolerant to moderate wavelength drifts of a local oscillator. A gain clipped electrical amplifier is used in the novel receiver as a rectifier for bandpass signal recovery.

REFERENCES:
patent: 4718121 (1988-01-01), Epworth
patent: 5422752 (1995-06-01), Hardcastle
patent: 6661973 (2003-12-01), Huber et al.
patent: 6907052 (2005-06-01), Kozlowski et al.
patent: 7092645 (2006-08-01), Sternowski
patent: 2002/0167708 (2002-11-01), Tsao et al.
patent: 2004/0047561 (2004-03-01), Tuda
patent: 2004/0120356 (2004-06-01), Davenport et al.

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