OPTICAL DEVICE WITH CASCADED STEERING DEVICES
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United States of America Patent
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Issued Date -
Sep 11, 2008
app pub date -
Jan 15, 2008
filing date -
Mar 8, 2007
priority date (Note) -
Abandoned
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Abstract
An optical switching device for wavelength divisional multiplexed signals uses cascaded arrays of optical steering devices for 1.times.N routing of WDM optical signals, where N=4, 8, 16, etc. Two cascaded arrays provide 1.times.4 switching; three cascaded arrays provide 1.times.8 switching; and so on. Each array is configured with independently controlled optical steering devices so that each wavelength channel of the WDM signal may be routed to any of N output ports. The optical steering devices may be micro-mirrors, liquid crystal-based polarization modulators, or a combination of both. By incorporating cascaded optical steering devices into a single WDM switching device, cost effective 1.times.N switching of WDM optical signals may be realized.
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