Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2007-11-16
2011-12-06
Sedighian, Mohammad R (Department: 2613)
Optical communications
Multiplex
Wavelength division or frequency division
C398S102000, C398S161000, C398S053000
Reexamination Certificate
active
08073333
ABSTRACT:
According to one embodiment, a multiplex delay unit comprises an optical all-pass filter (OAPF) adapted to apply continuously tunable group delay to a wavelength division multiplexing (WDM) signal so that all of its WDM components are delayed by substantially the same delay time. The OAPF has a free spectral range (FSR) that matches spectral separation between carrier wavelengths of the WDM signal. Advantageously, an optical multiplex synchronizer suitable for feeding a synchronous optical switch fabric can be implemented as an integrated waveguide circuit using a plurality of such multiplex delay units.
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Bernasconi Pietro Arturo
LeGrange Jane D.
Alcatel Lucent
Gruzdkov Yuri
Mendelsohn Steve
Mendelsohn, Drucker & Associates P.C.
Sedighian Mohammad R
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