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Conference Paper
Photorefractive Effects, Materials, and Devices
Sanya, Hainan China
July 19, 2005
ISBN: 1-55752-793-8
Material Preparation and Characterization: Inorganic (MPCI)

Non-linear and photorefractive characterisation of highly confined LiNbO3 waveguides prepared by high-energy, low-fluence ion irradiation

O. Caballero, A. García-Cabañes, J. Carnicero, M. Carrascosa, F. Agulló-López, J. Olivares, A. García-Navarro, and G. García

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Abstract

A preliminary characterisation is presented on the non-linear and photorefractive behavior of LiNbO3 optical waveguides produced with a novel irradiation procedure. As described elsewhere, the method involves irradiation of the substrate with medium mass high-energy ions (F4+ at 20-22 MeV), whose electronic stopping power reaches a maximum value inside the crystal and not at the surface. Because a very low fluence is sufficient, the fabrication time is reduced about three orders of magnitude in comparison with similar guides prepared by conventional implantation. Thus, low­fluence irradiated guides seem serious candidate for massive cheap production in device applications. The guides show step-like, high-jump index profiles and support highly confined propagation modes. The fabrication process and the obtained index profiles have been described, and the second order nonlinear response and the recording and erasing of photorefractive gratings have been investigated in the paper. Results on the effect of the fluence (1014 at/cm2) and annealing treatments (300°C, 1 h) on the non-linear optical waveguide behavior are also presented.

© 2005 Optical Society of America

OCIS Codes
(130.3730) Integrated optics : Lithium niobate
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.5330) Nonlinear optics : Photorefractive optics
(230.7390) Optical devices : Waveguides, planar

Citation
O. Caballero, A. García-Cabañes, J. Carnicero, M. Carrascosa, F. Agulló-López, J. Olivares, A. García-Navarro, and G. García, "Non-linear and photorefractive characterisation of highly confined LiNbO3 waveguides prepared by high-energy, low-fluence ion irradiation," in Photorefractive Effects, Materials, and Devices, G. Zhang, D. Kip, D. Nolte, and J. Xu, eds., Vol. 99 of OSA Trends in Optics and Photonics (Optical Society of America, 2005), paper 179.
http://www.opticsinfobase.org/abstract.cfm?URI=PEMD-2005-179


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