Dual-electrode traveling wave optical phase shifters and methods
First Claim
1. A device comprising a plurality of electrodes, comprising:
- a first optical phase shifter comprising;
a first electrode having a first polarity;
a second electrode, spaced apart from the first electrode, having a second polarity that is opposite of the first polarity;
a first ground electrode, coupled to the first electrode of the first optical phase shifter, and a second ground electrode coupled to the second electrode of the first optical phase shifter, anda light input signal comprising a first optical signal and a second optical signal, wherein the device functions as a single arm modulator.
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Abstract
The invention discloses phase-shifters, modulators, and method that produces a smaller π by means of a field excitation using multiple electrodes. A negative signal is introduced that travels with the positive signal, which enhances the electric field significantly. The field enhancement is provided by the superposition of the fields accumulated from each electrode. A base or substrate material can be made from any compound having linear electro-optic properties, such as lithium niobate, lithium tantalite, potassium lithium niobate, potassium titanyl phosphate or gallium-arsenide. For lithium niobate, there are two possible orientations of electric field, z-cut orientation or x-cut orientation.
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Citations
12 Claims
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1. A device comprising a plurality of electrodes, comprising:
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a first optical phase shifter comprising; a first electrode having a first polarity; a second electrode, spaced apart from the first electrode, having a second polarity that is opposite of the first polarity; a first ground electrode, coupled to the first electrode of the first optical phase shifter, and a second ground electrode coupled to the second electrode of the first optical phase shifter, and a light input signal comprising a first optical signal and a second optical signal, wherein the device functions as a single arm modulator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification