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Vågledare samt förfarande för framställning av sådan: [Quasi-phase-matched optical waveguides and method of making same]
KTH, Superseded Departments, Physics.ORCID iD: 0000-0001-7688-1367
1988 (Swedish)Patent (Other (popular science, discussion, etc.))
Abstract [en]

A waveguide (and a method for fabrication of a waveguide) for electromagnetic waves, arranged in an optically non-linear crystal substrate (1), such as LiNbO3, LiTaO3 or KTiOPO4, whereby a periodically domain-inverted structure, with periodically reversed ferroelectric polarity, is provided in a channel waveguide (6), having a higher refractive index than other parts of the substrate. The regions of reversed ferroelectric polarity are achieved by means of a heat treatment yielding a domain-inversion governed by a periodic perturbation in the crystal surface, obtained by use of a periodic mask structure on the crystal surface. The periodic structure is arranged in such a way that it constitutes a quasi-phase-matching structure. Thereby the waveguide is capable of converting light or radiation of a certain wavelength (certain wavelengths) to light or radiation of another predetermined wavelength (other predetermined wavelengths) with high efficiency.

Place, publisher, year, edition, pages
National Category
Atom and Molecular Physics and Optics
URN: urn:nbn:se:kth:diva-93196OAI: diva2:515351
SE 462352C (1990-10-04)

US 5170460 A (1992-12-08)

Available from: 2012-04-12 Created: 2012-04-12 Last updated: 2015-03-30Bibliographically approved

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Laurell, Fredrik
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Atom and Molecular Physics and Optics

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