Abstract
Feature Issue on Optical Performance Monitoring (OPM). An integrated,
high-resolution spectral polarimeter is demonstrated in 4%-index-contrast Ge-doped
silica waveguides. A ring resonator achieves a wavelength selectivity of less than 2
GHz FWHM, and tunability is realized via thermo-optic phase shifters with scanning
speeds on the millisecond time scale. Real-time, in-service polarization-mode
dispersion monitoring is thus possible for studying dynamic channel behavior and for
feedback to adaptive compensators. Measurements of the differential group delay,
output state of polarization, and principal states of polarization of 10- and
40-Gbit/s modulated signals are presented. Measurements of time-varying PMD and
higher-order PMD are also presented to demonstrate the device's
capability.
© 2003 Optical Society of America
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