In-band signaling in optical cross-connect switch using amplitude modulation
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United States of America Patent
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May 20, 2014
Grant Date -
May 2, 2013
app pub date -
Sep 25, 2012
filing date -
Nov 1, 2011
priority date (Note) -
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Abstract
Signals employed to align and cause dithering via MEMS mirrors in an optical cross connect switch are manipulated to impose, on the optical beam (steered via the MEMS mirrors) amplitude modulation and in particular a time-varying set of induced mirror angles that yield a desired time history of optical power level that is modulated according to a digital code in the amplitude modulation pattern. The controlled time sequence expressed as a time-varying optical power level can be used for in-band signaling along the same optical channels available for conventional optical data. The amplitude modulated signal is conveyed through the cross connect switch and is useful for example in control and command of the cross connect switch.
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