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- Korkishko, Y. N., et al.
(författare)
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Proton exchanged LiNbO3 and LiTaO3 optical waveguides and integrated optic devices
- 2003
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Ingår i: Microelectronic Engineering. - 0167-9317 .- 1873-5568. ; 69:04-feb, s. 228-236
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Tidskriftsartikel (refereegranskat)abstract
- We show that proton exchanged LiNbO3 waveguides exhibit very complex structural chemistry. Seven HxLi1-xNbO3 and six HxLi1-xTaO3 crystallographic phases have been identified in PE LiNbO3 and LiTaO3 waveguides, respectively. A correlation is done between the electrooptical, nonlinear and photorefractive properties, the processing conditions and the refractive index changes of the waveguides. Some integrated optical devices have been realized.
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- Korkishko, Y. N., et al.
(författare)
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Proton exchanged LiNbO3 optical waveguides : Nonlinear, electrooptical and photorefractive properties
- 2001
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Ingår i: Ferroelectrics (Print). - 0015-0193 .- 1563-5112. ; 264:04-jan, s. 1983-1988
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Tidskriftsartikel (refereegranskat)abstract
- We show that proton exchanged LiNbO3 waveguides exhibit very complex structural chemistry. Seven HxLi1-xNbO3 crystallographic phases have been identified in PE LiNbO3 waveguides. A correlation is done between the electroptical, nonlinear and photorefractive properties, the processing conditions and the refractive index changes of the waveguides.
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- Korkishko, Y. N., et al.
(författare)
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Second-order optical non-linearity of proton exchanged lithium tantalate waveguides
- 2001
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Ingår i: Applied physics. B, Lasers and optics (Print). - : Springer Science and Business Media LLC. - 0946-2171 .- 1432-0649. ; 73:06-maj, s. 519-522
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Tidskriftsartikel (refereegranskat)abstract
- A detailed correlation between the fabrication conditions, crystallographic phase state of HxLi1-xTaO3 waveguides and second-order optical non-linearity has been investigated by using reflected SHG measurements from the polished waveguide end face. The non-linearity, strongly reduced after the initial proton exchange, is found to be restored and even increased after annealing. However, this apparent increase in the non-linearity is accompanied by a strong degradation of the quality of the SHG reflected beam in the region of the initial as-exchanged waveguide due to beam scattering. The high temperature proton exchange technique has been shown to produce high-quality alpha -phase waveguides with essentially undegraded non-linear optical properties. There is no phase transition when the alpha -phase waveguides are fabricated by direct exchange. This phase presents the same crystalline structure as that of LiTaO3 and maintains the excellent non-linear properties of the bulk material. The results obtained are important for the design fabrication and optimization of guided-wave non-linear optical devices in LiTaO3.
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