Methods and apparatus for generation and control of coherent...

Details Methods and apparatus for generation and control of coherent... Methods and apparatus for generation and control of coherent...

2005-08-23

2005-08-23

Robinson, Mark A. (Department: 2872)

Optical: systems and elements

Polarization without modulation

By relatively adjustable superimposed or in series polarizers

C359S490020, C398S152000, C398S159000, C398S161000

Reexamination Certificate

active

06934083

ABSTRACT:
Methods and apparatus for coherent PMD generation are provided. A PMD generator can include at least four birefringent stages in optical series, thereby forming at least three pairs of adjacent stages. Each of the stages includes a harmonic differential group delay element and a phase-compensating element. The generator can be made colorless (i.e., made to have the same PMD at each WDM channel) and can be operated such that DGD and second order PMD can be independently generated and controlled. These PMD generators can be used in PMD compensators and PMD emulators.

REFERENCES:
patent: 6417948 (2002-07-01), Chowdhury et al.
patent: 6542650 (2003-04-01), Khosravani et al.
patent: 2002/0015547 (2002-02-01), Patel

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