Optical waveguides – Polarization without modulation
Reexamination Certificate
2006-10-03
2006-10-03
Healy, Brian (Department: 2883)
Optical waveguides
Polarization without modulation
C356S328000, C359S483010, C385S036000
Reexamination Certificate
active
07116848
ABSTRACT:
A polarization independent optical spectrum analyzer comprises a diffraction grating, input and output slit means and polarization-maintaining multi-pass optics for directing a light beam to and fro across the diffraction grating while maintaining its linear state of polarization. The optical spectrum analyzer further comprises a polarization control unit for decomposing a light beam for analysis into first and second beams having mutually orthogonal states of polarization (SOPs) and then adjusting one or both SOPs so that they are parallel to each other and to one of the dispersion plane of the diffraction grating which is rotated to select different wavelengths of the first and second light beams. The first and second light beams are passed across the diffraction grating repeatedly by multi-pass polarization-maintaining optics and are outputted and detected separately.
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Gariepy Daniel
He Gang
Schinn Gregory Walter
Adams Thomas
EXFO Electro-Optical Engineering Inc.
Healy Brian
Peng Charlie
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