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Control of section-asymmetry crosstalk in Δβ-reversal directional coupler switches

Control of section-asymmetry crosstalk in Δβ-reversal directional coupler switches

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© The Institution of Electrical Engineers
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The crosstalk caused by a slight longitudinal misalignment of reversed-Δβ electrodes on directional coupler switches is investigated. We show that this crosstalk can be reduced or eliminated by use of independent voltage adjustment of the two electrode sections. The displacement must be maintained below 1.5% if the magnitudes of the two required voltages are not to differ by more than 10%.

Inspec keywords: directional couplers; electro-optical devices; crosstalk; switches; optical couplers; integrated optics; interference suppression

Other keywords: section-asymmetry crosstalk; directional coupler switches; independent voltage adjustment; crosstalk elimination; integrated optics; displacement; reversed-Δβ electrodes; guided wave electrooptic directional couplers

Subjects: Integrated optics; Electro-optical devices; Integrated optics; Optical waveguides; Optical waveguides and couplers

References

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      • Bogert, G.A., Murphy, E.J., Ku, R.T.: `A low crosstalk 4 × 4 Ti:LiNbO', Technical digest of conference on integrated and guided-wave optics, p. PD15–PD18, Paper PDP3.
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      • S.K. Korotky . Three space representation of phase-mismatch switching in coupled two-state systems. IEEE J. Quantum Electron. , 952 - 958
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