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US 2008/0166083 A1Published application
Compact optical modulator
AssigneeLucent Technologies Inc.
InventorChristopher Richard Doerr
Life of this patent
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Abstract
We present a novel design for an optical differential quadrature phase shift keying modulator comprised of two intensity modulators in a three-arm interferometer.
Claims10
(canceled)
The optical modulator of claim 3, wherein one or more of the intensity modulators is an electro-absorption modulator.
An optical modulator for generating a quadrature phase-shift keyed signal comprising:
- an optical interferometer with at least three arms:
- CHARACTERIZED IN THAT:
- at least two of the arms each contain an intensity modulator;
- wherein the interferometer has three arms, and the power ratios in the three arms are substantially 37% for each of the two arms containing the modulators and substantially 26% for the third arm.
1 more element
An optical modulator for generating a quadrature phase-shift keyed signal comprising:
- an optical interferometer with at least three arms;
- CHARACTERIZED IN THAT:
- at least two of the arms each contain an intensity modulator;
- wherein the interferometer has three arms, and the relative phase between the two arms containing the modulators is substantially +/−90 degrees, and the relative phase between the third arm and those two arms is substantially +/−135 degrees.
1 more element
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Dependencies are inferred from the claim text.