S. Tonchev

MKS Instruments (United States)

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ΟP

Ο. Parriaux

Centre National de la Recherche Scientifique

I. Savatinova

Georgi Nadjakov Institute of Solid State Physics

Yves Jourlin

Université Claude Bernard Lyon 1

МK

М. Kuneva

Bulgarian Academy of Sciences

A.V. Tishchenko

Volgograd State Technical University

Nathalie Destouches

Laboratoire Hubert Curien

N M Lyndin

Prokhorov General Physics Institute

Stéphanie Reynaud

Scientific Centre of Monaco

Mario N. Armenise

Polytechnic University of Bari

Manuel Flury

Laboratoire des Sciences de l'Ingénieur, de l'Informatique et de l'Imagerie

Cooperative Institutions

Centre National de la Recherche Scientifique

Bulgarian Academy of Sciences

Université Jean Monnet

Georgi Nadjakov Institute of Solid State Physics

Laboratoire Hubert Curien

Université Claude Bernard Lyon 1

Institut d’Optique Graduate School

Institute of Electronics

Aix-Marseille Université

Université Paris-Sud

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Modified refractive index of ZnS nanoparticles doped glasses

Myriam Moussaoui Rachida Saoudi S. Tonchev Sabine Palle A.V. Tishchenko

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Holistic fabrication of stitchingless subwavelength cylindrical gratings by phase-mask coordinate transform

Yves Jourlin Ο. Parriaux S. Tonchev Markku Kuittinen Janne Laukkanen

A periodic grating with integer number of periods is fabricated at the resist-coated wall of a cylinder by exposing a circularly symmetrical planar high-index phase-mask to a cylindrical wave. This allows a transposition of the spatial coherence features easily achieved in a planar 2D space to the 3D space of cylindrical waves and elements.

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Expanding the applicability domain of phase-mask lithography of gratings to the extreme

Yannick Bourgin Yves Jourlin S. Tonchev Ismo Vartiainen Ο. Parriaux

The applicability domain of phase-masks for the manufacturing of gratings is widely expanded by breaking the limits of a so far very narrow spatial frequency spectral width. This is a result of searching for high index deep-UV film materials and of resorting to a novel phase-mask scheme at the large period side.

Spatial frequency

Phase Unwrapping

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Highly accurate index measurement of layers by means of grating excitation of guided modes

Manuel Flury Nathalie Destouches Frédéric Celle S. Tonchev Jean-Claude Pommier

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Low loss polarizing beam splitter using the long range plasmon mode along a continuous metal film

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2006)

Yves Jourlin Émilie Gamet S. Tonchev A.V. Tishchenko Ο. Parriaux

A sinusoidally weakly undulated continuous thin gold film embedded between a polymer substrate and a thin cover of the same polymer, the metal film thickness, the period and the wavelength being such that a normally incident wave excites the long range plasmon mode of the metal film, is shown to exhibit strong resonant transmission for the local TM polarization and strong reflection of the TE polarization. Such structure represents a very simple, average performance polarization beam splitter for white light processing.

Beam splitter

Radial polarization

10.1117/12.668364

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<title>Optical and electro-optical properties of H:LiTaO3 waveguides</title>

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (1994)

I. Savatinova S. Tonchev Todor Popov Mario N. Armenise E. Liarokapis

A systematic study of the optical parameters and electrooptical coefficient r₃₃ of optical waveguides fabricated by proton exchanged in LiTaO₃ substrates has been carried out. Results of direct measurements of the electrooptical coefficient r₃₃ on both as fabricated and annealed planar waveguides are presented. The samples have been annealed in the 265 - 420 degree(s)C range at different cooling rate. It has been found that quick (20 degree(s)C/min) cooling rate leads to different values of refractive index change and r₃₃ coefficient in the exchanged layers than the slow one (1 - 2 degree(s)C/min).

Degree (music)

Optical materials

Temperature coefficient

10.1117/12.175000

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97% top hat efficiency, 4 J/cm2 damage threshold compression gratings

Quantum Electronics and Laser Science Conference (2007)

F. Canova J. P. Chambaret O. Utéza P. Delaporte M. Tondusson

High diffraction efficiency all-dielectric pulse compression grating is reported with a close to 100% flat top over more than 20 nm spectral width around 800 nm wavelength and more than 4 J/cm2 damage threshold.

Diffraction efficiency

Pulse compression

10.1109/qels.2007.4431349

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Integrated microinterferometric sensor for in-plane displacement measurement

Applied Optics (2010)

Jerzy Krężel Małgorzata Kujawińska Jürgen Mohr Markus Guttmann Markus Wissmann

We present an integrated sensor based on a grating interferometer (GI) for in-plane displacement measurement in microregions of large engineering structures. The system concept and design, based on a monolithic version of Czarnek's GI, is discussed in detail. The technology chain of the GI measurement head (MH), including the master fabrication and further replication by means of hot embossing, is described. The numerical analyses of the MH by means of geometric ray tracing and scalar wave propagation are provided. They allow us to determine geometrical tolerance values as well as refractive index homogeneity and nonflatness of MH working surfaces, which provide proper beam guiding. Finally the demonstrative measurement performed with a model of the sensor is presented.

10.1364/ao.49.006243

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Characterization of H:LiNbO 3 optical waveguides by m-line spectroscopy

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2001)

I. Savova S. Tonchev I. Savatinova P. P. Kircheva

In this work we present nondestructive measurements of the optical parameters and propagation losses of multimode planar H_xLi_1-xNbO₃ waveguides using m-line spectroscopy. The dependence of the attenuation coefficient on the effective refractive index was investigated for z- and y-cut samples. Theoretical modeling of the experimental data revealed that the main loss mechanism in z-cut waveguides is the surface scattering, while in y-cuts the mode conversion dominates.

Characterization

Line (geometry)

10.1117/12.425133

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Proton-exchanged waveguiding layers in Y-cut lithium niobate: Analysis of the phase composition by spectroscopic methods

Solid State Sciences (2010)

М. Kuneva S. Tonchev D. Nesheva Peter A. Atanasov

10.1016/j.solidstatesciences.2010.01.023

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Citations (5)