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Second-order optica...
Second-order optical non-linearity of proton exchanged lithium tantalate waveguides
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Korkishko, Y. N. (författare)
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Fedorov, V. A. (författare)
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Alkaev, A. N. (författare)
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- Laurell, Fredrik (författare)
- KTH,Fysik
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(creator_code:org_t)
- 2014-04-23
- 2001
- Engelska.
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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
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- 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.
Nyckelord
- refractive-index profiles
- wave-guides
- cut litao3
- phases
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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