Optical waveguides – Temporal optical modulation within an optical waveguide
Patent
1993-06-18
1994-10-25
Gonzalez, Frank
Optical waveguides
Temporal optical modulation within an optical waveguide
385 2, G02B 610, G02F 1035
Patent
active
053596781
ABSTRACT:
The effects of polarization dependent hole burning and/or polarization dependent loss are reduced by modulating the state of polarization (SOP) of an optical signal being launched into the transmission path periodically between first and second states of polarization of at least one pair of orthogonal states of polarization. Ideally, the launched modulated signal should spend equal time intervals in both states of the orthogonal pair. In one exemplary embodiment, the SOP is modulated such that it moves along a great circle on the Poincare sphere. In another exemplary embodiment, the SOP is modulated such that it traces a complete great circle on the Poincare sphere. In a preferred embodiment, a complete great circle is traced at a uniform speed on the Poincare sphere.
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Heismann Fred L.
Rosenberg Robert L.
AT&T Bell Laboratories
Gonzalez Frank
Stafford Thomas
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