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Proceedings Paper

Self-pumped phase conjugate BaTiO3:Rh ring mirror at 1.06 μm: optimization of reflectivity, rise time, and fidelity
Author(s): Nicolas Huot; Jean-Michel C. Jonathan; Gilles Pauliat; Daniel Rytz; Gerald Roosen
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Paper Abstract

Photorefractive rhodium doped barium titanate (BaTiO3:Rh) is now well known for its significant response at near infrared wavelengths .We studied and characterized this crystal at 1.06 j.tm. By twowave mixing experiments in a 45°-cut crystal, we measured a maximum photorefractive gain F of 23 cm1 with cw illumination and 16.6 cm1 with nanosecond illumination, together with a low absorption (0. 1 cm1). Using spectroscopic determinations of the photorefractive sites 2 (Rh3, Rh4, Rh5), we showed that the photorefractive properties of BaTiO3 Rh could be well described by a three charge state model .This enabled to determine the internal parameters of the material using experimental characterizations and to accurately predict its performances at 1 .06 tm. Comparative characterizations of several BaTiO3:Rh samples proved that this material is now well reproducible, which is of prime importance for applications. Reproducibility, high photorefractive gain, low absorption and accurate theoretical description make BaTiO3:Rh a good candidate for realization and optimization of non linear functions like optical phase conjugation. The application we are interested in, is the dynamic wavefront correction of nanosecond Nd:YAG master-oscillator power-amplifier (MOPA) laser sources.

Paper Details

Date Published: 9 October 1998
PDF: 8 pages
Proc. SPIE 3470, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IV, (9 October 1998); doi: 10.1117/12.326849
Show Author Affiliations
Nicolas Huot, Institut d'Optique Theorique et Appliquee (France)
Jean-Michel C. Jonathan, Institut d'Optique Theorique et Appliquee (France)
Gilles Pauliat, Institut d'Optique Theorique et Appliquee (France)
Daniel Rytz, Forschungsinstitut fuer Mineralische und Metallische Werkstoffe (Germany)
Gerald Roosen, Institut d'Optique Theorique et Appliquee (France)


Published in SPIE Proceedings Vol. 3470:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IV
Francis T. S. Yu; Shizhuo Yin, Editor(s)

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