Patent
1989-04-25
1991-03-26
Lee, John D.
350 9612, 350 9613, G02B 610, G02F 101
Patent
active
050023535
ABSTRACT:
Non-linear distortion of a modulated light carrier wave arising from optical modulator nonlinearity of significantly reduced by offsetting a dominant cubic term of intermodulation distortion in transverse electric (TE) mode with a dominant cubic term of intermodulation distortion in transverse magnetic (TM) mode. The offset is achieved by adjusting the magnitude of the components of light in TE mode and TM mode to compensate for the differing response of components of the light wave in TM mode versus components in TE mode to a given voltage level applied to the carrier wave during modulation. The adjustments to the relative magnitude can be performed by a polarizer or polarization-preserving fiber. This method may be used in a modulating system and an electro-optical communication system.
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Barns Stephen W.
Lee John D.
Massachusetts Institute of Technology
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