Dark spatial photovoltaic solitons and soliton-induced waveguide elements in ion-implanted planar lithium niobate waveguides
Publication date
2008
Document type
Conference paper
Author
Editor
Tománek, Pavel
Senderáková, Dagmar
Hrabovský, Miroslav
Organisational unit
Technische Universität Clausthal
Scopus ID
ISBN
ISSN
Conference
Photonics, Devices, and Systems IV 2008
Series or journal
Proceedings of SPIE - The International Society for Optical Engineering
Periodical volume
7138
Part of the university bibliography
Nein
Abstract
Formation of dark spatial optical solitons in planar waveguides produced by implantation of light ions into Fe- or Cudoped X cut lithium niobate wafers is experimentally studied. The implantation both of protons and O3+-ions results in the excellent waveguide layers with their thickness about 3 microns and optical losses less than 1 dB/cm. The soliton states at light wavelengths of 532 nm and 633 nm are developed due to the self-defocusing photorefractive- photovoltaic nonlinearity of lithium niobate. Extraordinarily polarized light beams are used in experiments to form dark solitons and to probe the soliton-induced waveguide channels. Steady-state dark photovoltaic spatial solitons have been realized in both, H+- implanted and O 3+- implanted planar waveguides at optical powers from 10 to 100 microwatts. The storage time of soliton-induced channel waveguides makes up at least some hours without special illumination of a planar waveguide and they may be erased within some seconds in a case of their permanent readout with stronger light beams. The possibility to form more complicated channel waveguide structures in regimes of dark spatial solitons is also demonstrated. © 2008 SPIE.
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