Method and apparatus for reducing system deterioration...

Details Method and apparatus for reducing system deterioration... Method and apparatus for reducing system deterioration...

2006-05-23

2006-05-23

Healy, Brian (Department: 2883)

Optical waveguides

Temporal optical modulation within an optical waveguide

C385S002000, C385S003000, C398S065000, C398S081000, C398S147000, C398S148000, C359S337500

Reexamination Certificate

active

07050658

ABSTRACT:
A method and apparatus for minimizing system deterioration caused by polarization effects (e.g., a polarization-dependent gain (PDG), a polarization-dependent loss (PDL), and a polarization mode dispersion (PMD)). The apparatus performs a signal modulation process to enable one bit to simultaneously contain two orthogonal polarization components, resulting in a minimum DOP (Degree Of Polarization). If a signal undergoes the PMD, the apparatus converts an NRZ (Non Return to Zero) signal into an RZ (Return to Zero) signal, resulting in minimum inter-symbol interference caused by the PMD. The apparatus can improve a performance of an optical signal during the PMD operation, whereas a conventional PMD compensation technique has been designed to remove system deterioration caused by only the PMD.

REFERENCES:
patent: 5311346 (1994-05-01), Haas et al.
patent: 6583903 (2003-06-01), Way et al.
patent: 2003/0011839 (2003-01-01), Liang et al.
patent: WO 01/65733 (2001-09-01), None

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