Optics: measuring and testing – For optical fiber or waveguide inspection
Reexamination Certificate
2007-07-13
2008-08-19
Chowdhury, Tarifur R (Department: 2886)
Optics: measuring and testing
For optical fiber or waveguide inspection
C385S011000
Reexamination Certificate
active
07414711
ABSTRACT:
Polarization mode dispersion (PMD) induced system penalty ε is determined from optical characteristics of an optical wavelength division multiplexed (WDM) signal that is carried on a network. The method involves tapping the optical WDM signal, separating an optical channel from the tapped optical WDM signal, performing a frequency-resolved state of polarization (SOP) measurement on the channel, and computing the PMD-induced system penalty as ε=AL2+BL4, in which A and B are predetermined parameters and L is an SOP string length based on the SOP measurement.
REFERENCES:
patent: 7256876 (2007-08-01), Boroditsky et al.
patent: 2003/0095313 (2003-05-01), Menikoff et al.
Boroditsky Mikhail
Brodsky Mikhail
Frigo Nicholas J.
Magill Peter
AT&T Corp.
Chowdhury Tarifur R
Pajoohi Tara S
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