Polarization-insensitive, electro-optic modulator

Details Polarization-insensitive, electro-optic modulator Polarization-insensitive, electro-optic modulator

1996-01-26

1998-05-12

Ngo, John

Optical waveguides

Temporal optical modulation within an optical waveguide

Electro-optic

385 45, 385132, G02B 610

Patent

active

057518670

ABSTRACT:
An intensity modulator having a Mach-Zehnder structure with first and second waveguide arms formed of an electro-optic polymer. The active molecules of the waveguide arms are poled in first and second different and substantially orthogonal directions. Electrodes are arranged to receive a modulating voltage and generate first and second electric fields which are respectively aligned with the first and second directions. As a consequence, the modulation depth of an optical signal which is transmitted through the modulator is substantially insensitive to the polarization of the signal. Other embodiments combine mode splitters and combiners with first and second Mach-Zehnder modulators which have electro-optic polymer waveguides. The active molecules of the arms of the two Mach-Zehnder modulators are poled in orthogonal directions.

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