Polarization mode dispersion generator
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United States of America Patent
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Issued Date -
Jan 31, 2002
app pub date -
Jul 24, 2001
filing date -
Jul 31, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Methods and apparatus for generating polarization mode dispersion ('PMD'), especially for use in PMD emulators and compensators, are provided. The apparatus can include a lens assembly, an optical beam turning assembly, and a variable PMD generating assembly located between the lens assembly and the optical turning assembly. The variable PMD generating assembly can include a fixed DGD stage and a variable electro-optically controlled retardation stage. The method involves directing the beam through the variable PMD generating assembly at least twice by folding the beam with the turning assembly. Various phase and temperature compensation techniques are also provided.
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