6533b7d8fe1ef96bd12697a4
RESEARCH PRODUCT
Z+/Z− lithium niobate optical waveguide sensitivity related to pyroelectric effect
Anne-laure PointelJerome HaudenFabrice Devauxsubject
Materials scienceFabricationbusiness.industryLithium niobatePhysics::Optics01 natural sciencesFerroelectricityWaveguide (optics)Atomic and Molecular Physics and OpticsPyroelectricity010309 opticsCrystalCondensed Matter::Materials Sciencechemistry.chemical_compoundOpticschemistry0103 physical sciencesLight beamWaferElectrical and Electronic EngineeringbusinessEngineering (miscellaneous)description
Lithium niobate crystal is widely used for the design and fabrication of integrated electro-optic modulators. As a ferroelectric material, one sees its spontaneous polarization change with temperature variations. This phenomenon, known as the pyroelectric effect, induces strong waveguide transmission variations for waveguides realized on Z -cut wafers. Waveguides made by titanium in-diffusion either on the Z + or Z − side of the crystal show a significant difference in temperature behavior. Experimental data, enlightened by numerical simulations, help to show why Z − waveguides are more immune to temperature changes than Z + ones.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-12-11 | Applied Optics |