Optical: systems and elements – Optical modulator – Light wave temporal modulation
Reexamination Certificate
2005-07-05
2005-07-05
Juba, Jr., John (Department: 2872)
Optical: systems and elements
Optical modulator
Light wave temporal modulation
C359S281000, C359S490020, C359S900000
Reexamination Certificate
active
06914707
ABSTRACT:
A polarization scrambler, and associated method for polarization scrambling, is provided wherein light is passed through a time-variant retarder. At least after upstream connection or downstream connection of a time-invariant retarder, this time-variant retarder may be represented as a retarder with eigen modes which are uniformly distributed on the Poincaré sphere and with a delay of 5π/6. An exemplary embodiment contains only two electro-optical wave plates, which are actuated by alternating signals containing harmonics. The polarization scrambler which is produced is independent of the input polarization of the light and can be used in devices for detection of polarization mode dispersion.
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Noe Reinhold
Sandel David
Bell Boyd & Lloyd LLC
Jr. John Juba
Siemens Aktiengesellschaft
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